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Geology
Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin.
Subtopics:
Economic geology (57 items)
Geochronology (20 items)
Geomorphology (33 items)
Hydrogeology (39 items)
Marine geology (37 items)
Mineralogy (14 items)
Petrology (2 items)
Sedimentology (16 items)
Stratigraphy (7 items)
Structural geology (6 items)
Volcanology (49 items)
Related topics:
Results 1 - 299 of 299 listed by similarity [list alphabetically]
Geology [New Window]
Homepage about the Geology Discipline with links to what's new, publications, real-time hazards information, partnerships, fellowship program, and major science programs.
Geology and hydrogeology of the Florida Keys [New Window]
Article on geology and hydrogeology of the Florida Keys with sections on Holocene and Pleistocene geology, water resources, and introduction with a brief history and overview of early studies.
Geology of the onshore part of San Mateo County, California: a digital database [New Window]
This digital map database represents the general distribution of the geology (bedrock and surficial deposits) in San Mateo County. Accompanying text file (*.txt or *.ps) provides current information on the geologic structure and stratigraphy.
Geology, geochemistry and geophysics of sedimentary rock-hosted Au deposits in P.R. China [New Window]
Second report of a joint project with the Tianjin Geological Academy to study sedimentary rock-hosted Au deposits in China. Links to text in PDF format with appendices in *.pdf, *.xls, *.csv, *.jpg, and *.tif formats. Also readme file of CD-ROM version.
Asbestos: geology, mineralogy, mining, and uses [New Window]
Report on asbestos, six types of mineral fibers belonging to two mineral groups, serpentines and amphiboles,with fiber morphology, crystal structure, analytical methods, properties, mining, milling, uses, and safety factors.(PDF file,28 pp.,4.5 MB)
PDF Beyond the Golden Gate--oceanography, geology, biology, and environmental issues in the Gulf of the Farallones [New Window]
A geologic and oceanographic study of the waters and Continental Shelf of Gulf of the Farallones adjacent to the San Francisco Bay region. The results of the study provide a scientific basis to evaluate and monitor human impact on the marine environment.
Central Region geology [New Window]
Main page for Central Region Geology with links to offices and laboratories, science teams and capabilities, and geology services.
Coastal and Marine Geology (CMG) InfoBank [New Window]
Access to InfoBank, an online data catalog, to browse or retrieve coastal and marine geology program information, images, and data on gravity, bathymetry, seismic activity, magnetics, samples, facilities, cruises and equipment.
Coastal and Marine Geology Program [New Window]
Home page for Coastal and Marine Geology with links to topics of interest (sea level change, erosion, corals, pollution, sonar mapping, and others), Sound Waves monthly newsletter, field centers, regions of interest, and subject search system.
Coastal and Marine Geology Program interactive map server [New Window]
Interactive map server to view and create maps using available coastal and marine geology data sets of offshore and coastal U.S. and the Gulf of Mexico. Links to available data and metadata that can be downloaded.
Databases and simplified geology for mineralized areas, claims, mines, and prospects in Wyoming. [New Window]
This data release contains mineral resource and geology data for metallic and nonmetallic mineral sites in Wyoming. Data is provided in both spreadsheet format (Microsoft Excel) and in GIS ArcView and MapInfo. Text available in PDF format.
Deserts, geology and resources [New Window]
Online edition of booklet describing desert geology and mineral resources.
Map showing geology, oil and gas fields and geologic provinces of Africa, ver. 2.0 [New Window]
Digitally compiled interactive maps with links to metadata, descriptions of map units, and data files.
PDF Relations among geology, physiography, land use, and stream habitat conditions in the Buffalo and Current River systems, Missouri and Arkansas [New Window]
San Francisco Bay Region geology [New Window]
Gateway to the geology of the San Francisco Bay region with links to geologic maps, paleontology, marine geology, earthquakes, landslides, and geophysics. Includes maps, 3-D models, and photos.
Tapestry of time and terrain: union of two maps, geology and topography [New Window]
Colored map compiled by merging geologic and topographic maps of the United States through computer processing and enhancement with links to panoramic movie using QuickTime, descriptions of features, and a game entitled Puzzle of Regions.
Western Region Coastal and Marine Geology Program [New Window]
Site for Western Region Coastal and Marine Geology Program conducting scientific research in the coastal and offshore areas of California, Oregon, Washington, Alaska, Hawaii, and other U.S. Pacific Islands.
Woods Hole Coastal and Marine Geology Field Center [New Window]
Site with links to projects of the field center of the Woods Hole Coastal Marine Geology Program on underwater areas between shorelines and the deep ocean, off the U.S. East Coast, the Gulf of Mexico, and in parts of the Caribbean and Great Lakes.
Maps On Demand: limited printing of digitally supported U.S. Geological Survey maps and reports [New Window]
The USGS provides map-on-demand (MOD) printing for selected infrequently requested geologic and other theme map products providing high-quality paper-copy maps as needed. Site links to available map products with thumbnail views and how to order.
Southern California Areal Mapping Project (SCAMP): find geologic maps [New Window]
Download digital geologic databases produced by the Southern California Areal Mapping Project (SCAMP) or view SCAMP work in progress by clicking on 1:100,000-scale, 30x60' quadrangles.
Three-dimensional geologic maps and visualization [New Window]
Techniques of computer-based representations of areal geology to construct three-dimensional geologic maps that retain all the information of traditional geologic maps while providing a more detailed picture of the subsurface.
U.S. - Mexico Border Environmental Health Initiative: interactive maps [New Window]
Geographic and scientific information focused on health issues in the area of the US-Mexico border
1999 resource assessment of selected Tertiary coal beds and zones in the northern Rocky Mountains and Great Plains region. [New Window]
Coal resources, stratigraphy, geochemistry, coal quality and geology of Tertiary coal beds and zones in the northern Rocky Mountains and Great Plains regions. Text in PDF format and available on CD-ROM.
A Devils Hole primer [New Window]
Plain-language questions and answers about the stable-isotopic record obtained from Devils Hole, a cave in south-central Nevada. The data do not agree with the Milankovitch hypothesis concerning the causes of glacial cycles in climate change.
PDF A volcano rekindled; the renewed eruption of Mount St. Helens, 2004-2006 [New Window]
Abandoned Mine Lands (AML) [New Window]
Homepage of the Abandoned Mine Lands (AML) initiative programs supporting actions to remedy contaminations associated with hard rock mining. Includes data from the Upper Animas River and Boulder River, bibliography of reports, and pictures.
Access USGS - San Francisco Bay and Delta [New Window]
Main page for accessing links for information and data on the San Francisco Bay estuary and its watershed with links to highlights, water, biology, wetlands, hazards, digital maps, geologic mapping, winds, bathymetry and overview of the Bay.
Additional oil and natural gas research [New Window]
Brief descriptions, contacts, and links to other information and products for research programs of the USGS Central Energy Team on gas hydrates, petroleum expulsion, unconventional natural gas, petroleum systems, and reserve growth.
Alaska Resource Data Files [New Window]
Downloadable descriptions of mines, prospects, and mineral occurrences for individual U.S. Geological Survey 1:250,000-scale quadrangles in Alaska.
Alaska Volcano Observatory [New Window]
Homepage for Alaska Volcano Observatory (AVO) with offices in Anchorage and Fairbanks monitors and studies Alaska's hazardous volcanoes. Links to featured news, updates, publications and products, and a volcano atlas for Alaska.
Alaska mineral resources [New Window]
Reports, data, and current research on mineral resources in Alaska
Alaska petroleum resources [New Window]
Information on Alaskan energy resources in oil, petroleum, and natural gas with links to publications and other research.
America's volcanic past - volcanic highlights and features [New Window]
Links to volcanism, volcanic history, volcanic rocks, and general geology by state, by region, national parks and national monuments and a brief introduction to volcanism around the U.S. entitled: Windows into the past.
An interpretation of the 1977 Airborne Electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona [New Window]
Complex report on the interpretation of aeromagnetic data to study hydrogeology of the San Pedro basin, Cochise County, Arizona determining geologic structure, basin fill and depth to water. Online version of a CD-ROM publication.
An overview of coastal land loss with emphasis on the southeastern United States [New Window]
Comprehensive background information on coastal land loss, discussing the influence of waves and storms, the intrinsic characteristics of the shoreline materials, and the role of human activities.
Aquifer basics [New Window]
Links to general information on water supply by aquifers based on rock types and to principal national aquifers by name.
Arctic National Wildlife Refuge, 1002 Area, petroleum assessment, 1998, including economic analysis [New Window]
Arctic National Wildlife Refuge (ANWR) 1002 area's petroleum resource assessment. Text available in PDF and HTML formats.
Ask-A-Geologist [New Window]
Site to submit a question to Ask-A-Geologist where scientists research the answers to the questions, then reply directly by email.
Assessment of potential coastal impacts: Hurricane Rita [New Window]
Areas susceptible to inundation during landfall of Hurricane Rita are assessed by comparing lidar-derived dune elevations to simulated storm surge values. Results shown on pictorial maps.
Atchafalaya & Mississippi River Deltas study: a tale of two deltas [New Window]
Project of the Gulf of Mexico Integrated Science program that evaluates the transport and sedimentation of contaminates through the Mississippi River and Atchafalaya River delta to the near-shore Gulf of Mexico. Includes aerial photographs.
Atlantic margin offshore sediments: cooperative database and GIS development website [New Window]
This site is designed to provide information on federal interagency and cooperative developments related to coastal sand and gravel resources and management issues along the Atlantic continental margin.
BRASS: Bedrock Regional Aquifer Systematics Study [New Window]
Description of the project to publish new bedrock geologic maps in the United States to advance the understanding of the region's bedrock aquifers. Includes list of projects.
Bedform sedimentology [New Window]
Bedform sedimentology home page with links to information on sedimentary structures including, explanatory text, computer-generated images and movies, photographs, and bedform simulation software.
Biogeochemical and geohydrologic processes in a landfill-impacted alluvial aquifer, Norman, Oklahoma [New Window]
Discussion and links to research for the multi-disciplinary investigation on the Norman Landfill located on alluvium associated with the Canadian River in central Oklahoma.
Biological soil crusts [New Window]
Explains biological soil crusts, organism-produced soil formations commonly found in semiarid and arid environments, with special reference to their biological composition, physical characteristics, and ecological significance.
PDF Biological soil crusts: webs of life in the desert [New Window]
Fact sheet on the need to protect biological soil crusts in the desert. These crusts are most of the soil surface in deserts not covered by green plants and are inhabited by cyanobacterium (blue-green algae) and other organisms useful to the ecosystem.
Borehole geophysics as applied to geohydrology [New Window]
Project summary, photos of logging truck, and bibliographies on log interpretation techniques and instrumentation to record geophysical data in wells and test holes for studying ground water hydraulics and evaluate waste disposal sites.
Carbon dioxide and helium discharge from Mammoth Mountain, Long Valley caldera, California [New Window]
An explanation of toxic carbon dioxide emissions at Mammoth Mountain in Long Valley caldera, and a description of magmatic helium discharge at the Mammoth Mountain fumarole with photos, maps, and links to other studies.
Carolina slate belt gold deposits in Virginia, North Carolina, South Carolina, and Georgia [New Window]
Report of research on the Carolina slate belt and gold deposits in Virginia, North Carolina, South Carolina, and Georgia with geologic mapping, mineralogic, geochemical, and fluid evolution studies, radiogenic dating, and stable isotope studies.
Cascades Volcano Observatory [New Window]
Portal to information provided by the Cascades Volcano Observatory in Vancouver, WA with links to reports and activity in the Cascade Range and other volcanoes and multiple links to general information on volcanology, reports, research, and maps.
Cascades Volcano Observatory - Learn about volcanoes [New Window]
Educational volcano site providing answers to frequently asked volcano questions with links to other general information on volcanoes and to information on specific volcanoes including the Cascade Range volcanoes.
Central California Digital Elevation Model (DEM) and bathymetry images [New Window]
Digital Elevation Model (DEM) images and bathymetry data of the San Francisco Bay, Santa Clara, and the Monterey Bay and Canyon areas.
Central Energy Team [New Window]
The Central Energy Team, Denver, in the USGS Energy Resources Program, provides assessments of energy resources (coal, oil, natural gas). Site links to world and national assessments, publications and products, and Methane Field Conference.
Central Energy Team publications [New Window]
Catalog of USGS publications on energy resources of the U.S. including online publications, paper publications, and geospatial products (interactive maps and GIS data)
Central Region [New Window]
Entry to USGS Central Region programs with links to Biological Resources, Geology, National Mapping, Water Resources, Office of Central Region Services, emergency information, and records of a Rockies field trip, and clickable map to state programs.
Central Region Mineral Resources Team [New Window]
Site for programs of the Central Region Mineral Resources Team with links to products, personnel, projects and programs of land stewardship, regional geochemistry, analytical chemistry, geology and resources assessment and remote sensing.
City of Flagstaff Project: ground water resource evaluation, remote sensing component [New Window]
Flagstaff atlas webpages including digital elevation model images, Landsat Thematic Mapper images, SPOT panchromatic stereo images, and digital photos of Flagstaff. Includes link to the original Open File Report OF-96-739.
Coal Resource Classification System of the U.S. Bureau of Mines and U.S. Geological Survey [New Window]
A report published jointly by the U.S. Bureau of Mines and U.S. Geological Survey giving definitions of coal resource classification terms.
Coal Resource Classification System of the U.S. Geological Survey [New Window]
The classification system by which coal is classified into resource/reserve base/reserve categories on the basis of the geologic assurance of the existence of those categories and on the economic feasibility of their recovery.
Coal on federal lands [New Window]
Information on coal on federally owned public lands with links to database and maps for federal coal ownership of the United States, Rocky Mountains and Great Plains, and Colorado Plateau.
Coal-bed gas resources of the Rocky Mountain region [New Window]
Summary of the technically recoverable coal-bed gas resources of the Rocky Mountain region.
Coal-bed methane: potential and concerns [New Window]
Fact sheet in PDF format on occurrence and recoverability of coalbed methane in the U.S. and related environmental concerns.
Coalbed methane studies [New Window]
Methane (natural gas), while frequently developed with petroleum, also occurs in association with coal and accounts for about 7.5 percent of U.S. natural gas production. Links to digital publications on coalbed methane.
Coastal change hazards digital library [New Window]
Online catalog of reports and data on coastal change hazards, indexed by author, agency, project, location, feature type, and topic
Commodity statistics and information [New Window]
Searchable database of mineral and material commodities with descriptions, contacts, and historical and current statistics of worldwide supply, demand, production and trade in Mineral Commodity Studies, Minerals Yearbooks, and special publications.
Compilation of various geologic time scales [New Window]
Preliminary report comparing various geologic time scales. Text is HTML or plain text format, and colored compilation chart in Excel format.
Contamination in Fractured Rock Aquifers [New Window]
Overview of fractured rock research aimed at understanding the movement of water through fracture networks, and characterize field conditions influencing contaminant migration. Includes programs and publications.
Continental shelf GIS for the Monterey Bay National Marine Sanctuary [New Window]
Interactive maps of the continental shelf of the Monterey Bay National Marine Sanctuary with GIS layers for sediment data, bathymetry, geology, bathymetry, sonar imagery, and tectonics.
Core Research Center [New Window]
Overview of the Core Research Center (CRC) in Denver for preserving valuable rock cores for permanent storage and making the cores available for examination and testing. Includes links to services, well reports, and resources.
Costly landslide events in the United States: map layer description file [New Window]
GIS data set from the USGS National Landslides Hazards Program showing major landslide events in the United States and Puerto Rico with metadata. Map layer can be downloaded in shapefile format or SDTS format.
Crater Lake Data Clearinghouse [New Window]
The Crater Lake Data Clearinghouse website is a gateway to information and data on Crater Lake with links to data downloads of bathymetry, maps and imagery, a fly-by movie, photos, and information on geology, maps, history, and biota.
Cross-bedding, bedforms,and paleocurrents [New Window]
The on-line version of Cross-Bedding, Bedforms, and Paleocurrents, with computer images, photographic images, and text.
Cruise report by Coastal Surveyor Cruise C-1-99-SC: multibeam mapping of the Long Beach, California, continental shelf [New Window]
Description of the work and results of a cruise by the Pacific Sea Floor Mapping project to map the Long Beach, California continental shelf based on data from high-resolution multibeam technology.
Crustal Imaging and Characterization Team [New Window]
Crustal imaging and characterization home with links to projects on earth science technologies including geophysical, geochemical, and isotope studies, online publications and data, and newsletter Minerals News.
Cryptobiotic soils: holding the place in place [New Window]
Describes biological soil crusts, with special reference to their role in resisting soil erosion, improving soil fertility, and increasing water infiltration in the deserts of the Colorado Plateau region.
Detection and measurement of land subsidence using Global Positioning System surveying and interferometric synthetic aperture radar, Coachella Valley, California, 1996-2005 [New Window]
Detailed measurements of elevation help to understand the extent and severity of subsidence. Study asks if subsidence indicates the aquifer system is compacting temporarily or permanently, and are the changes human-induced or tectonic.
Distribution of high-temperature (>150 °C) geothermal resources in California [New Window]
Description and map of geothermal resources in California.
Drilling technique [New Window]
Brief description of the coring system and crew used to obtain cores for geological research in the Eastern Region as one of the specialized capabilities of USGS teams.
Early Paleozoic biochronology of the Great Basin, western United States [New Window]
Publication (PDF format) in three parts on the biostratigraphy and lithostratigraphy of the Ibexian Series in the North American Ordovician, with sections on the southern Egan Range, Nevada and the biostratigraphy of the eastern Great Basin.
Earth Surface Processes [New Window]
Homepage for Earth Surface Processes Team with research studies in two general categories: climate change and geologic mapping. Links to research activities, available data sets, workshop, and programs.
Earth science photographic archive [New Window]
Photographic archive collection from the USGS Photo Library. Photos dated 1868-1992 are of geology, earthquake damage, national parks, pioneer photographers, St. Helens eruption and mining and available at 100, 700 and 1400 dots/inch resolution.
Earth tides and volcano monitoring [New Window]
Article in the May 28, 1998 issue of Volcano Watch describing of correlation of earth tides to volcanic eruptions and value in monitoring underground magma movement with deformation measurement instruments including tiltmeters and strainmeters.
Earthquake and fault data for Google Earth [New Window]
Downloadable data for earthquakes and faults for use with the Google Earth software
Eastern Earth Surface Processes Team [New Window]
The Eastern Earth Surface Processes Team provides geologic mapping regional geologic studies to determine stratigraphy and geologic structure, topical studies to understand geologic and surficial processes, and syntheses of earth science data.
Eastern Energy Resources Team (EERT) [New Window]
Links to overview, major programs, products and publications on coal, oil & gas, environment & human health, and resource economics, and special applications (Geo-Data Explorer (GEODE) and Kidzone)
Eastern Mineral Resources [New Window]
Home page for Eastern Mineral Resources Team conducting research on the occurrence, quality, quantity, and availability of mineral resources. Links to products, descriptions of research projects, and staff.
Economics of undiscovered oil in the federal lands of the National Petroleum Reserve, Alaska [New Window]
Online report summarizing the economic analysis of the U.S. Geological Survey's 2002 petroleum assessment of the Federal lands in the National Petroleum Reserve Alaska (NPRA) study area.
Edwards Aquifer online resources [New Window]
Recharge and discharge summaries and other data, aeromagnetic survey map, and publications on Edwards Aquifer, Texas.
Energy Resources Program [New Window]
Links to Energy Resources Program research on coal, oil & gas, other energy sources, environment & human health, publications, energy resource assessment, and Geo-Data Explorer (GEODE).
Energy Resources Program - Western Region [New Window]
Home page for the Western Region Energy Resources Program with links to Alaska petroleum studies project, coal, oil and gas, other energy sources, environment and human health, publications, energy links, and GEODE.
Environmental processes that affect mineral deposits in the Eastern United States [New Window]
Studies in Eastern United States on massive sulfide deposits in Maine, Vermont, Great Smoky Mountains, and Virginia to assess potential environmental impacts.
Erosion in the Rio Puerco: geography and processes [New Window]
Paper on the accelerated erosion of the Rio Puerco, a tributary of the Rio Grande in New Mexico, which has deepened and widened its channel, or arroyo, since the settlement of the region.
Eruption warning and real-time notifications [New Window]
Describes strategy of volcano warnings and the real-time detection of a sudden eruption or lahar and immediate notification of the activity to the public and local, state, and federal emergency-management officials.
Eruptions from the Inyo chain about 600 years ago: sequence of events and effects in the Long Valley Area [New Window]
Describes the volcanic activity that occurred along the southern part of the Mono-Inyo Craters volcanic chain in California about 600 years ago.
Eruptions of Mount St. Helens: past, present, future [New Window]
Online booklet on the 1980 eruption of Mount St. Helens, past history, and future hazards.
Extent of Pleistocene lakes in the western Great Basin [New Window]
Map of Pleistocene pluvial lakes in the western Great Basin (Nevada, eastern California, southern Oregon). Includes metadata, online PDF map view, and downloadable ArcInfo export files, ArcView shapefiles, and TIFF files.
Fault and fold database of the United States [New Window]
Online database of faults and associated folds in the United States that are believed to be sources of significant earthquakes during the last 1.6 million years.
Field Conference on Impacts of Coalbed Methane Development in the Powder River Basin, Wyoming. [New Window]
Field trip to Powder River Basin coalbed methane (CBM) development areas showing impacts related to drilling, facilities, pipeline networks, access roads, withdrawal, and disposal of co-produced water from CBM wells.
Field trip to Barringer (Meteor) Crater, Arizona [New Window]
Notes and photos about a field trip taken to Barringer Crater (also known as Meteor Crater), Arizona, as part of the dedication of the Shoemaker Center in Flagstaff.
Flow through unsaturated fractured rock [New Window]
Site describes studies using flow visualization and rock matrix pressure measurements to study flow through fractures in the unsaturated zone, which plays an important role in water infiltration and contaminant transport.
Fluvial geomorphology studies in Kansas [New Window]
Report of completed studies that have investigated the response of river and stream channels in Kansas to a variety of human-caused and natural disturbances.
Fossils, rocks, and time [New Window]
Booklet describes how paleontologists use the identification of fossils to recognize rocks of the same or different ages.
GLORIA Mapping Program [New Window]
GLORIA is a digital sidescan sonar capable of producing digital image maps of the sea floor from reflected sound waves. Site includes description of digital processing, mosaicking, and links to samples of image maps.
Gas hydrate studies: a part of the Geophysics Group [New Window]
Brief overview of gas hydrates and current research. Site also contains links to related USGS research and publications and web sites of other groups participating in gas hydrate research.
Generalized surficial geologic map of the Pueblo 1 degree x 2 degree quadrangle, Colorado. [New Window]
Surficial geologic map of the Pueblo quadrangle in Colorado with text and references in PDF format, metadata, and GIS files to download.
Geochemical sediment analysis procedures [New Window]
Manual of chemical sediment analysis using Coulometer and CHN Analyzers to measure carbon content, spectrometric analysis for biogenic silica, and radiochemistry to measure isotopes. Includes techniques,sample preparation, and safety procedures.
Geochronology [New Window]
Description of the methods of geochronology used to estimate the dating of rocks and sediments with links to technique, equipment and contacts for a variety of methods.
Geographic Information Systems (GIS) in Missouri [New Window]
Website with links to USGS hydrologic, geohydrologic, soil, and geologic projects in Missouri using geographic information systems (GIS) technology with digital datasets of images, models, and maps produced by the projects to view.
Geologic framework and process of the Lake Pontchartrain Basin [New Window]
Field methods, topics of investigation, shoreline changes, publications, and satellite imagery related to geologic and hydrologic processes affecting Lake Pontchartrain and adjacent lakes which form a large estuary in the Gulf Coast region.
Geologic hazards team office [New Window]
An organizational unit within USGS that studies earthquakes, landslides, and geomagnetism. Contact information and descriptions of current research projects.
Geologic hazards: landslide images [New Window]
Photographs of examples of landslides viewable online as 100-200kb or 800 x 600kb images.
Geologic history of Cape Cod, Massachusetts [New Window]
Describes the history, geologic changes (including the glacial formation and sea level changes), and geologic mapping of Cape Cod, Massachusetts.
Geologic history of Long Valley Caldera and the Mono-Inyo Craters volcanic chain, California [New Window]
Summarizes the geologic and volcanic activity of the Long Valley Caldera and Mono-Inyo Craters volcanic chain in east central California.
Geologic map of the Eagle quadrangle, Eagle County, Colorado [New Window]
The Eagle quadrangle covers an area that straddles the Eagle River and Interstate 70 (I-70) and it includes the town of Eagle, Colo., which is located in the southwestern part of the quadrangle, just south of I-70 and the Eagle River, about 37 km west of
Geologic studies of coral reef habitats: remote sensing applications to coral reef environments [New Window]
Use of remotely sensed images and spatial data to help map and study coral reef environments. Web page deals with the remote sensing work done for the Pacific Ocean component of the USGS coral reef project.
Geologic time online edition [New Window]
Booklet giving general explanations of geologic time, major divisions of geologic time, relative and radiometric time scales, index fossils, and the age of the earth.
Geologic time scale chart [New Window]
Chart of the geologic time scale with references.
Geological Survey TRIGA Reactor (GSTR) Services [New Window]
Services available at the Geological Survey TRIGA Reactor (GSTR) site in Denver with information on irradiation, neutron activation analysis, fission track radiography, and geochronology and tours of the facility.
Geomorphology and sediment transport -- river mechanics [New Window]
Current river mechanics research on particle friction angles of fluvial gravels (data files compressed in BenHex, Winzip and Unix) and Grand Canyon Beach evolution (animation requiring Java 1.0) plus digital elevation files (*.hgx and *.zip files).
Geopubs: on-line geologic publications of the western United States [New Window]
Access to USGS on-line geologic publications of the western United States categorized by state, region USGS series, geologic maps, and software with links to state geologic survey publications.
Geothermal and hydrothermal activity [New Window]
Glossary of geothermal and hydrothermal activity terms.
Geothermal industry temperature profiles from the Great Basin [New Window]
Subsurface temperature, well temperature, and well data of geothermal resources in the Great Basin.
Geysers, fumaroles, and hot springs [New Window]
Description of volcanic geysers, fumaroles, and hot springs.
Global inventory of natural gas hydrate occurrence [New Window]
This updated global inventory reports on natural gas hydrate recovered or inferred from geophysical, geochemical, or geological evidence. Includes links to world location maps, inventories, references and posters. Also in PDF format files.
Grain size analyzer technique [New Window]
Description of the technique used in particle-size analysis
Ground water atlas of the United States [New Window]
The U.S. ground water atlas consists of information on ground water resources of 13 regions covering the 50 States, Puerto Rico, and the U.S. Virgin Islands. Text and maps can be viewed online and downloaded as ASCII, GIF, and *.eps files.
PDF Ground-water availability in the United States [New Window]
Report examines what is known about the Nation's ground-water availability, and outlines a program of study to improve our understanding of ground-water availability in major aquifers across the Nation. With regional examples.
Ground-water monitoring for pesticides in Wyoming [New Window]
Sampling program to determine if pesticides are present in ground water, in accordance with Wyoming's Generic State Management Plan for Pesticides in Ground Water (SMP).
Ground-water recharge in the arid and semiarid southwestern United States [New Window]
A systematic presentation of climatic and hydrogeologic framework of the area, regional analysis of ground-water recharge, and an overview of 8 site-specific case studies.
Gulf Coast Framework Studies Home Page [New Window]
Provides geologic, geophysical, and geochemical framework studies that will aid in a reassessment of energy commodities (coal, gas, and oil) in the Gulf Coast Region.
Gulf of Mexico Integrated Science [New Window]
Website of the Gulf of Mexico Integrated Science program to understand the framework and processes of the Gulf of Mexico using Tampa Bay as a pilot study. Links to publications, digital library, water chemistry maps, epiphytes, and field trips.
Hawaiian Volcano Observatory [New Window]
Hawaiian Volcano Observatory's latest news with links to information on Kilauea, Mauna Loa, and other volcanoes, earthquakes, volcanic hazards, photo archive, and general information about the center.
Hawaiian Volcano Observatory (HVO) earthquakes: HVO seismic network [New Window]
Description of the seismic monitoring of the active Hawaiian volcanoes with information on the network, instrumentation, and recording stations with links to related information.
Hawaiian Volcano Observatory spotlight images archive [New Window]
Images of Hawaiian volcanoes and the islands they've built in the past few million years, images of recent eruptions, and Hawaiian landscapes.
Health effects of mineral dusts [New Window]
Overview of project to develop and apply a variety of earth science methods to interpret the geologic links between mineral dusts such as silica and asbestos and human health problems with links to contacts, tasks, and products.
High Plains aquifer resources and information [New Window]
Links to reports, bibliographies, and other information on the High Plains aquifer.
Hurricane and extreme storm impact studies: coastal and nearshore mapping with scanning airborne laser (LIDAR) [New Window]
Airborne scanning laser surveys (LIDAR) are used to obtaining data to investigate the magnitude and causes of coastal changes that occur during severe storms. Links to examples of coastal mapping during specific hurricanes.
Hydrates cruise in the Gulf of Mexico [New Window]
Investigation of the upper- and middle continental slope of the Mississippi Canyon, including the Gulf of Mexico, for the distribution of gas-hydrate deposits with links to a DEM image map, bathymetry data, and research technology.
Hydrogeologic framework of Antelope Valley and Bedell Flat, Washoe County, west-central Nevada [New Window]
Description of the hydrogeologic framework of Antelope Valley and Bedell Flat in west-central Nevada north of Reno-Sparks area. Gravimetric and seismic-refraction methods were used in the study. Report available in PDF format or HTML format.
Interior of the Earth [New Window]
General Interest Publication on the structure of the planet Earth including the crust, the mantle, and the core with drawings to scale on the cover and a table listing the thickness of the parts.
Investigating the Chesapeake Bay impact crater [New Window]
Links to information on the formation and structure of Chesapeake Bay including online reports, recent field work, field work archives, cooperating agencies, bibliography, and links to articles about other terrestrial impact craters.
Kentucky District - program highlights [New Window]
Brief descriptions of research programs in water resources in Kentucky with a few links to program websites. Programs include data collection projects, acid mine drainage, hydrodynamics, geology, waste site cleanup and hydrogeology.
Kilauea - eruption update and image archive [New Window]
Current Kilauea eruption activity, updated daily with recent photos, maps, and deformation information and links to video for broadband users, photo glossary, and image archive.
Kilauea - perhaps the world's most active volcano [New Window]
Current activity, hazards, and history of eruptions of Kilauea Volcano.
Laboratory manual for x-ray powder diffraction [New Window]
Report presents an abridged guide for laboratory technicians and students using X-ray powder diffraction methodology to study crystalline structure and to determine the mineralogy of finer grained sediments, especially clays.
Lake Pontchartrain basin: bottom sediments and related environmental resources [New Window]
This publication focuses on the geological framework and sedimentary processes of the Lake Pontchartrain Basin and provides links to interactive tools, regional research, and sediment data in GIS formats for display and analysis.
Lake Roosevelt-Upper Columbia River environmental studies [New Window]
Description of research studies of the Lake Roosavelt-Upper Columbia area on contaminants and effects on environmental health with links to publications and products, partners, related links, project summaries, and contacts.
Lake Tahoe Data Clearinghouse [New Window]
This website is a gateway to information and data on Lake Tahoe with links to Lake Tahoe Initiative, geography, history, lake facts, GIS Data, DEM, DOQ, DLG imagery, bathymetry, satellite imagery, land cover, census, soils, pictures, and general maps.
Land Subsidence in the United States [New Window]
Describes and provides examples of impacts of human-induced land subsidence resulting from the extraction of subsurface water, including aquifer-system compaction, drainage of organic soils, dissolution and collapse of susceptible rocks.
Land Subsidence in the United States [New Window]
Describes and provides several detiled examples of impacts of human-induced land subsidence resulting from the extraction of subsurface water, including aquifer-system compaction, drainage of organic soils, dissolution and collapse of susceptible rocks.
Land subsidence and aquifer-system compaction in the Tucson Active Management Area, south-central Arizona, 1987-2005 [New Window]
Results of ground-surface monitoring and borehole water table measurements document subsidence of the land surface correlative with changes in the ground water.
Land subsidence from ground-water pumping [New Window]
Online report for an interactive workshop Impact of Climate Change and Land Use in the Southwestern United States. Discusses land subsidence due to increased ground water pumping in the Southwest and the damage caused by subsidence.
Landslide events [New Window]
Current, regularly updated reports of landslides nationwide
Landslide types and processes [New Window]
An introductory primer giving basic scientific facts about landslides--the types of landslides, how they are initiated, and how they can begin to be managed as a hazard.
Landslides learning & education [New Window]
A wide variety of explanatory and educational resources about landslides and their relationship with earthquakes and storms, and preparedness. Includes glossary and photos.
Landslides research [New Window]
Description of research projects in progress to make accurate landslide hazard maps and forecasts of landslide occurrences.
Lewis and Clark and the U.S. Geological Survey in North Dakota [New Window]
Homepage linking the historic journey of Lewis and Clark and the research of the USGS in the same region with links to mapping history, remarkable points on the Missouri River, educational activities, photo gallery, and publications.
PDF Limestone; a crucial and versatile industrial mineral commodity [New Window]
Usefulness of limestone, problems encountered in finding and exploiting suitable limestone resources
Long Island Sound [New Window]
Long Island Sound interactive map with GIS datasets and sonar imagery.
Long Island Sound sidescan sonar mosaics [New Window]
Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor.
Louisiana continental slope [New Window]
Louisiana continental slope interactive map with GIS datasets and sonar imagery.
Luminescence dating - introduction and overview of the technique [New Window]
Brief overview of luminescence dating is presented, including a description of the method, its uses, and proper sample collection techniques. Links to other U.S. laboratories for luminescence dating are also provided.
Major aquifers in New Jersey [New Window]
Geologic description of the principal coastal and non-coastal aquifers in New Jersey and relationship to water quality and water supply.
Major drainage basins in Massachusetts and Rhode Island [New Window]
Location and geology of drainage basins in Massachusetts and Rhode Island.
Map and database of Quaternary faults and folds in Colombia and its offshore regions [New Window]
PDF file of map of Quaternary faults and folds in Columbia prepared as part of the World Map of Major Active Faults with locations, ages, and activity rates of major earthquake-related features accompanied by database of description and activity.
Marine aggregate resources and processes [New Window]
Regional studies mapping the seafloor sedimentary character and assessing marine sand and gravel resources around the United States, to inform beach nourishment and coastal restoration, benthic habitat and sediment transport studies
Marine research publications [New Window]
Bibliography of publications relating to the research of the United States Geological Survey, Woods Hole, MA dating from 1962 to the present with links to publications that are online. Listed by series and with a free text search option.
Marine reserves and biological habitats: Monterey Bay, California [New Window]
Brief description of the research program to inventory the natural resources of Monterey Bay National Marine Sanctuary with links to cruises, and publications and products, including an internet map server, imagery, and geologic descriptions.
Mass Wasting Following the 2002 Missionary Ridge Fire near Durango, Colorado, a Field Trip Guidebook [New Window]
Guidebook with photos, maps, and diagrams explaining how forest fires have affected the likelihood of mass wasting, with discussions of steps taken to minimize future impacts.
Mass wasting presentation [New Window]
Presentation explaining the various types of mass wasting, how they work, and how they differ from one another, with diagrams and photos.
Mauna Loa current activity [New Window]
Current activity of Mauna Loa Volcano with news, GPS data, electronic tiltmeter data, and current seismicity plus links to long term monitoring.
Mauna Loa, Earth's largest volcano [New Window]
Current activity, hazards, and history of eruptions of Mauna Loa.
Measuring human-induced land subsidence from space [New Window]
Examples of the use of Satellite Interferometric Synthetic Aperture Radar to measure and map changes on the Earth's surface as an aid to understanding how ground-water pumping, hydrocarbon production, or other human activities cause land subsidence.
Measuring land subsidence from space [New Window]
Describes the use of satellite-borne Interferometric Synthetic Aperture Radar (InSAR) to precisely measure, monitor, and assess small changes in land surface elevation resulting from human-induced or naturally occuring land subsidence.
Meteoritical Bulletin database [New Window]
Searchable database of all known meteorites and impact craters worldwide, based on published reports of the Meteoritical Society and several international research organizations.
Mineral Resources Data System (MRDS) [New Window]
MRDS is a worldwide database of metallic and industrial mineral sites. Links to portions of the database that are available online.
Mineral Resources Program [New Window]
Homepage of the Mineral Resources Program that provides current, impartial information on the occurrence, quality, quantity, and availability of mineral resources with links to projects, publications, spatial data, teams, issues, and news.
Mineral deposit models [New Window]
Publications by the USGS on mineral deposit models converted to digital files that can be downloaded. Some are *.pdf files requiring Adobe Acrobat Reader to view and download text
Mineral resources online spatial data [New Window]
Website for geospatial data on mineral resources of the U.S. or the world that users can locate by geographic area, view, and download.
Mineral resources spatial data [New Window]
Geochemical, geological, geophysical, mineral, and general reference spatial datasets that users can locate and download.
Minerals information [New Window]
Statistics and information on worldwide supply, demand, and flow of minerals and materials essential to the U.S. economy, national security, and protection of the environment. Links to publications, recycling, and historical statistics.
Minerals publications and data products [New Window]
Site for publications on minerals resources with links to those online. Includes reports in series, CD-ROMS, spatial data, statistics and commodity information, and mineral resources publications of regional Mineral Resources Teams.
Mollusks [New Window]
Information on mollusks and uses of the identification of fossil mollusks in the fields of biostratigraphy, geochronology, paleocoeanography, paleoecology and ecosystems history. Links to experts and related USGS projects.
Monitoring data of the Long Valley caldera and Mono-Inyo Craters volcanic chain, California [New Window]
Describes the monitoring effort and provides real-time data of the current restless activity of the caldera, including earthquakes, ground deformation, and release of volcanic gas and plus link to volcano monitoring techniques.
More than broken jars and roof tiles: the environmental legacy of a Roman mineral industry at Plasenzuela, Extremadura, Spain [New Window]
Adaptation of a poster presented at Metals in Antiquity Symposium, Harvard, September 10-13, 1997.
Most recent updates for U.S. volcanoes [New Window]
Short descriptions of recent volcanic activity in the US.
Multibeam mapping of the Pinnacles region, Gulf of Mexico [New Window]
Report on multibeam sonar imaging to produce bathymetric mapping of the reef tract known as The Pinnacles, northern Gulf of Mexico with links to images (ASCII or ArcInfo formats), data, metadata, ArcExplorer 2.0 project, and cruise report.
Multibeam mapping of the West Florida Shelf, Gulf of Mexico [New Window]
Georeferenced high-resolution mapping of bathymetry of the West Florida Shelf, Gulf of Mexico of areas suspected to be critical benthic habitats for fisheries. Includes links to images, data, metadata, and TIFF image files.
National Coal Assessment [New Window]
The USGS National Coal Assessment provides a quantitative study of the nation's coal endowment. Links to digital publications with maps for the Illinois Basin, Colorado, Arizona, Utah, and New Mexico, and Wyoming, Montana, and North Dakota.
National Coal Resource Assessment: Geologic assessment of coal in the Colorado Plateau: Arizona, New Mexico, and Utah [New Window]
Coal resources, stratigraphy, geochemistry, coal quality and geology of coal in the Colorado Plateau, Arizona, New Mexico and Utah. Text in PDF format and available on CD-ROM.
National Coal Resources Data System - US Coal Quality Database [New Window]
Searchable database, the COALQUAL database, presented here and in the USGS Open-file Report 97-134, is a subset of samples contained in the NCRDS (National Coal Resources Data System) database, and contains coal quality data on each sample.
National Coal Resources Data System - US Coal Resource Database (USGCOAL) [New Window]
Searchable database for locating information on coal resources by area, coalfield, coalbed, rank, quadrangle, source, years, or characteristics of thickness, overburden, and reliability.
National Cooperative Geologic Mapping Program [New Window]
Homepage linking to National Cooperative Geologic Mapping Program (NCGMP) components: FEDMAP for federal mapping projects, STATEMAP for state geological survey projects, and EDMAP for geologic mapping education projects.
National Geologic Map Database Catalog [New Window]
Search tool for locating print and online U.S. geologic maps by area, title, author, etc.
National Geologic Map Database Geologic Names Lexicon GEOLEX [New Window]
Search tool for locating lithologic and geochronologic unit names for geologic studies.
National Oil and Gas Assessment [New Window]
Links to oil and gas assessment maps of major basins in the United States and to related publications, and products.
National Petroleum Reserve Alaska Legacy Data Archive [New Window]
Access is provided to seismic data, image files of seismic data, well logs, and cores of petroleum reserves in Alaska from the National Petroleum Reserve, Alaska, and (NPRA) Legacy Data Archive.
National assessment of coastal vulnerability to sea-level rise: preliminary results for the U.S. Pacific Coast [New Window]
Report on the potential of coastal change due to future sea level rise using the coastal vulnerability index (C.V.I.) with two regional examples in San Francisco and Monterey Bay and Tillamook Head, Oregon, to Ocean Shores, WA.
National assessment of coastal vulnerability to sea-level rise: preliminary results of the U.S. Atlantic coast [New Window]
Brief report on map showing the relative vulnerability of the Atlantic coast to changes due to future rise in sea level. Includes links to similar maps in Open-file report 2000-178 on the Pacific Coast and 2000-179 on the Gulf of Mexico Coast.
National geologic studies of benthic habitats, northeastern United States : Stellwagen Bank National Marine Sanctuary Region off Boston, Massachusetts [New Window]
Geological research of the Stellwagen Bank National Marine Sanctuary sea floor are presented in the form of maps, posters, fact sheets, sonar images, and bottom photographs.
Natural Hazards - Landslides [New Window]
News and related information focusing on the importance of landslide hazards in the United States.
Natural Hazards - Volcanoes [New Window]
News and related information focusing on the hazards associated with volcanoes in the United States.
Natural gas hydrates: vast resources, uncertain future [New Window]
Fact sheet (PDF format) on gas hydrates occurrence, recovery, and use as an energy source.
Natural gemstones [New Window]
Online booklet on natural gemstones, terminology, geologic environment, birthstones, U.S. production, chemical formulas, and references.
New Jersey District - ground water information [New Window]
Links to New Jersey ground-water data including hydrogeology with a geologic map and description of major aquifers, water levels including real-time data and drought levels, and water-quality information.
Online guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico [New Window]
Field guide describing the geology and paleontology of the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico.
Organic metamorphism in the California petroleum basins: Chapter A - ROCK-EVAL and vitrinite reflectance [New Window]
Part A of a complex report on the results of ROCK-EVAL and vitrinite reflectance analysis of a large sample base from more than 70 wells located in three oil-rich California petroleum basins in order to study the formation of oil deposits.
Organic metamorphism in the California petroleum basins: Chapter B - Insights from extractable bitumen and saturated hydrocarbons [New Window]
Part B of a complex report on the results of geochemical analysis of 75 shale samples from the Los Angeles, Ventura, and San Joaquin Basins to gather observations relevant to exploration regarding the formation of oil deposits in these basins.
Our dynamic desert landscape [New Window]
Overview of studies of fragile and active landscape of the American Southwest deserts, including projects on geologic mapping, surface processes, remote sensing research, ecological processes, and earthquake hazard applications.
Pacific Seafloor Mapping Project [New Window]
Homepage for the Pacific Sea floor Mapping Project with links to images, downloadable data, applications, fly-by movies, products, publications, and contacts for studies of San Francisco Bay, Puget Sound, Lake Tahoe, and other Pacific areas.
Paleomagnetism analyses [New Window]
Links to laboratory capabilities within the USGS for paleomagnetism and paleomagnetic and rock magnetic procedures for dating and determination of magnetic direction and polarity in samples with links to techniques, equipment, and contacts.
Pathways of metal transfer from mineralized sources to bioreceptors [New Window]
A synthesis of the Mineral Resources Program's past and future research directions in the western U.S. on metal contamination due to mineral deposits and mining and the environmental effects on living organisms. Chapters 1, 4, and 6 as PDF files.
Pennsylvania compressed digital spatial data available for downloading [New Window]
Pennsylvania digital data for watershed boundaries, county geology, and flood mapping in Arc/Info format compressed with gzip utility for downloading plus links to other sources of data.
Pennsylvania fractured rock hydrology research [New Window]
Links to reports for Pennsylvania on borehole geophysical studies, aquifer tests and properties, modeling, and hydrologic effects of an earthquake with links to MOC3D solute transport software package, program mission, and bibliography.
Photo gallery of the Long Valley area, California [New Window]
Selection of photographic images of the Long Valley area that illustrate the consequences of the past geologic history of the Sierra Nevada, Long Valley Caldera, the Mono-Inyo Craters volcanic chain, glaciation, and faulting.
Photo glossary of volcano terms [New Window]
Illustrates and describes commonly used volcano-related terms.
Plus side of volcanoes: geothermal energy [New Window]
Examples of the use of volcanic energy in geothermal power plants.
Potential environmental impacts of quarrying stones in karst - a literature review [New Window]
This report is the result of an extensive literature search to determine the state-of-the-knowledge regarding environmental impacts from quarrying carbonate rocks in karst formations to better use of karst resources in sustainable ways.
Potential hazards from future volcanic eruptions in the Long Valley -- Mono Lake Area, California [New Window]
An introduction to the volcano hazards in the Long Valley area based on the past geologic history of the Long Valley Caldera and the Mono-Inyo Craters volcanic chain.
Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California [New Window]
A geologic map of the Santa Barbara coastal plain region in PDF format with data in GIS format (ArcInfo export, shapefile, and TIFF)
Preparing for volcanic emergencies [New Window]
Describes activities of USGS scientists to increase public awareness of volcano hazards with links to publication and videos for public information on understanding and preparing for volcanic hazards.
Programs in South Carolina [New Window]
Summary of USGS research programs in South Carolina including studies on gold and other mineral resources, digital mapping, water quality, geologic mapping, hydrology, saltwater encroachment, bioremediation, flooding, and earthquakes.
Report of the Community Sediment Transport Modeling Workshop [New Window]
Report on workshop to explore a community approach to improving deterministic models of sediment transport in coastal seas, estuaries, and rivers.
Reservoir sediment studies in Kansas [New Window]
Report of completed reservoir sediment studies in Kansas using a combination of bathymetric surveying, sediment coring, chemical analysis, and statistical analysis to understand the quantity and quality of deposited sediment.
STATEMAP information sheets [New Window]
Click on a state on a map or list to access status of geologic mapping at the scales of 1:24,000 and 1:100,000 under the National Cooperative Geologic Mapping Program (NCGMP) providing federal matching funds for state geologic work.
San Andreas Fault [New Window]
Online booklet on the San Andreas fault system on the California coastal region with discussion of faults, relationship of faults and earthquakes, magnitude of earthquakes, and earthquake probability.
Satellite technologies detect uplift in the Yellowstone Caldera [New Window]
Explanation of uplift in the land surface of the northern part of the Yellowstone caldera (12cm, about ~5 inches) that occurred between 1997 and 2003, including the scientific methods by which it was detected and analyzed.
Science challenge questions and answers [New Window]
Report giving a collection of 196 questions and answers on Earth and planetary sciences, such as volcanoes, earthquakes, hydrology, cartography, biology, and minerals for general audiences. Also information on obtaining an audio-CD copy.
Scientific capabilities [New Window]
Links to information on laboratory and field scientific techniques and equipment used and maintained for geologic research in the USGS. Site is incomplete and information is not available for some of the links.
Scientific drilling in Long Valley, California: What will we learn? [New Window]
Description of 1998 drilling project at Long Valley Exploratory Well located on Long Valley Caldera's resurgent dome to monitor changing conditions beneath the dome. (Document in PDF format.)
Sea-floor mapping technology [New Window]
Integrated shipboard data collection, processing, and archival system for digital sidescan sonar and seismic data used in mapping the inner continental shelf.
Sea-floor morphology between Año Nuevo and Santa Cruz, California [New Window]
Report with preliminary sea floor map displaying submarine rock exposures found along the northern part of Monterey Bay National Marine Sanctuary, extent based on side-scan sonar records, seismic-reflection records, and underwater video.
Seabed Observation and Sampling System (SEABOSS) [New Window]
Link to PDF fact sheet describing the SEABASS system that collects seabed images and sediment samples in coastal regions.
Selected Oklahoma District report abstracts [New Window]
Online abstracts of reports on the hydrology of Oklahoma with a few on minerals and geology, which have not been fully digitized. Complete publications are available in libraries and some are still available for purchase.
Selected Western Region Mineral Resources on-line publications [New Window]
Links to digital publications on minerals and mineral resources research in the western United States.
Selected volcano information [New Window]
Selected books, maps, videos, and other materials produced by the USGS Volcano Hazards Program. Many products highlighted here are intended for general audiences.
Sinkholes [New Window]
Explains sinkhole formation and distribution, with special emphasis on their occurrence in Missouri
South Florida Information Access (SOFIA) data exchange [New Window]
Provides links to the data, models and maps on the biology, ecology, geology, mapping, hydrology, and chemistry of research studies in southern Florida.
South Florida Information Access (SOFIA) projects by topic [New Window]
Links to explore South Florida and the Everglades ecosystem projects arranged by topic and subtopic, including proposals, project summaries, scopes of work, work plans, publications, and contacts.
Southern California Mapping Project (SCAMP) [New Window]
Description of the SCAMP project to produce geologic and geophysical maps and reports that describe the geologic setting and geologic history of southern California.
Southwest Information Node (SWIN) [New Window]
The Southwest Information Node of the National Biological Information Structure (NBII) provides links to research data, maps, and information on public lands including plant and animal natural resources, ecosystems, and invasive species.
Spectroscopy Lab [New Window]
Links to Spectroscopy Lab projects to identify and map materials through spectroscopic remote sensing (imaging spectroscopy, hyperspectral imaging, imaging spectrometry, ultraspectral imaging, etc) on the Earth and in space.
Spectroscopy of rocks and minerals, and principles of spectroscopy [New Window]
Technical review of the principles of spectroscopy and its use in identifying minerals and other materials.
State minerals statistics and information [New Window]
Links to mineral statistics from annual Mineral Yearbooks for each state in the United States and Puerto Rico, with contacts for further information, and means to apply for e-mail subscription service for regular updates.
Studies of polluted sediment offshore Los Angeles [New Window]
Overview of studies of marine sediment on the continental shelf south of Los Angeles contaminated with DDT and PCBs from past sewage effluent discharges with links to research on Santa Monica Bay, Los Angeles Shelf and Palos Verdes Peninsula.
Suspended-sediment database: daily values of suspended sediment and ancillary data [New Window]
Enables searching by state, hydrologic region, basin, time period, and length of record to retrieve suspended sediment data for the United States.
The Great Ice Age [New Window]
Booklet (PDF format) on the Pleistocene glaciations known as the Great Ice Age and the resulting geomorphological, climatic, and environmental changes that occurred on Earth during the period.
The Marine Realms Information Bank family of digital libraries: Access to free online information for coastal and marine science [New Window]
An introduction to three related USGS digital libraries: the general-purpose Marine Realms Information Bank (MRIB); the regionally focused Monterey Bay Science (MBS) Digital Library; and the topically focused Coastal Change Hazards (CCH) Digital Library.
The U.S. Geological Survey Ocean Bottom Seismometer Facility [New Window]
The Ocean Bottom Seismometer facility provides technical support for a variety of scientific investigations ranging from deep crustal structure to gas hydrate and surface sediments.
The carbon cycle in lakes of the Upper Mississippi Basin [New Window]
Summary of part of the USGS interdivisional Mississippi Basin Carbon project that will study the changes in climate and the environment through carbon cycle changes recorded in lake sediments in the Upper Mississippi River Basin.
The crustal structure of China from deep seismic sounding profiles [New Window]
Summary of results of Deep Seismic Sounding (DSS) profiles in China with links to a sample DSS profile, contour map of China with crustal thickness, crustal columns and maps showing profile locations and seismic data.
The great 1906 earthquake, 100 years later [New Window]
Annotated list of resources about the great earthquake of 1906, which caused significant devastation in and around San Francisco, California, compiled for the 100th anniversary of the disaster.
The sea-floor mapping facility at the U.S. Geological Survey Woods Hole Field Center, Woods Hole, Massachusetts [New Window]
Fact sheet on the sea-floor mapping facility at Woods Hole describing state-of-the-art technology used to produce accurate geologic maps of the sea floor and reporting on its data-acquisition, data-processing, and archiving capabilities.
This dynamic Earth: the story of plate tectonics [New Window]
Online booklet giving an introduction to the concept of plate tectonics and complements the information on the map This Dynamic Planet published in 1994 by the U.S. Geological Survey (USGS) and the Smithsonian Institution.
This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics [New Window]
Online world map with booklet (PDF format) giving an account of plate tectonics, volcanology, earthquake activity, and impact craters.
Types and effects of volcano hazards [New Window]
Describes the 6 main types of hazardous activities and processes associated with volcanoes, including tephra, lava flows, pyroclastic flows, lahars (volcanic mudflows), landslides, and volcanic gas.
U.S. Atlantic East Coast [New Window]
Atlantic East Coast interactive map with GIS datasets and sonar imagery.
U.S. Gulf of Mexico Shoreline Change [New Window]
Interactive map of the Gulf of Mexico coast reflecting shoreline changes.
USGS / Department of Energy cooperative studies in Nevada [New Window]
Describes cooperation of the USGS office in Las Vegas, Nevada, with the Department of Energy to address environmental and scientific issues at the Nevada Test Site and vicinity with links to project information.
USGS 40-Argon/39-Argon Geochronology Laboratory [New Window]
The USGS Argon-40/Argon-39 Geochronology Laboratory in Denver, Colorado, is a facility for determining the age of rocks and minerals by measuring the proportions of naturally occuring radioactive isotopes to their decay products.
USGS East-coast sediment analysis: analysis, procedures, database and georeferenced displays [New Window]
Grain-size analysis of marine sediments of the U.S. eastern coast with sampling and lab methods, surficial sediment database in three formats (Excel, Dbase IV, ASCII), and use of geographic mapping tools for visualizing sediment data layers.
USGS Luminescence Dating Laboratory [New Window]
The USGS Luminescence Dating Laboratory in the Denver Federal Center, Colorado, is a facility for determining the age of sedimentary and volcanic ash deposits using luminescence dating with information on sample collection and laboratory methods.
USGS activities in Nevada [New Window]
Homepage for USGS projects in Nevada with links to geography, biology, geology and water projects, news items, customers, Frequently Asked Questions (FAQs), education, recreation, data, studies, and publications on Nevada.
USGS fact sheets [New Window]
Access and listing of popular USGS publications listed by themes: resources, hazards, environment, information management, and states, and also by scientific discipline.
USGS news and information on El Nino [New Window]
Information sources on El Nino effects such as landslides, coastal hazards, floods. Includes links to maps and images.
USGS recreation site: your science gateway for safe and vital enjoyment of the outdoors [New Window]
Gateway to useful USGS websites for recreation in nature watching and exploring, boating, camping, climbing, fishing, hiking, biking, and hunting, with links to maps, real-time streamflow, geology, photos, and plant and animal information.
USGS studies in the New York Bight [New Window]
Describes and provides links to USGS research in the location of the estuary and coast of Long Island, New York, to map the sea floor and to study sediment transport, contaminants, and sand resources and coastal vulnerability.
Unconsolidated aquifers of upstate New York [New Window]
Information on aquifers in upstate New York which consist of unconsolidated deposits of sand and gravel that occupy major river and stream valleys or lake plains. Links to aquifer maps at scales 1:24,000 or 1:250,000 and cooperative publications.
Unsaturated-Zone Flow Program [New Window]
Overview of research to measure, predict, and understand the flow of water through soil and rock between the land surface and the water table with links to field sites, laboratory methods, theoretical developments, publications, and personnel.
Using tiltmeters to measure volcano deformation [New Window]
Describes and illustrates how scientists use electronic tiltmeters measuring deformation on volcanoes.
Volcano Hazards Program [New Window]
Homepage for USGS Volcano Hazards Program with feature stories, and links to worldwide volcano updates, volcanic hazards, reducing volcanic risk, USGS international programs, and resources such as educator's page, videos, and online reports.
Volcano Hazards Program, Long Valley Observatory [New Window]
Overview of the Long Valley Caldera with links to monitoring data including earthquakes and deformations, long-term outlook, volcano hazards in the area, USGS response plan, image gallery, monitoring and topical studies, publications and references.
Volcano and hydrologic hazards, features, and terminology [New Window]
Links to explanations of volcanic hazards and features and to a glossary of volcano terminology.
Volcano hazard zones in the Long Valley - Mono Lake Area, California [New Window]
Describes the volcano-hazard zones for the Long Valley and Mono-Inyo Craters volcanic chain identified by scientists of the U.S. Geological Survey.
Volcano monitoring at Yellowstone National Park [New Window]
Describes volcano monitoring at Yellowstone National Park including an update of recent volcanic activity, real-time data, and link to volcano monitoring techniques information.
Volcano video and television surveillance monitoring systems [New Window]
Visual monitoring of volcanoes by closed-circuit television and video monitoring for a permanent video record of events using slow-scan television which permits continuous surveillance at a distance for remote volcanoes or in times of danger.
Volcano watch [New Window]
Volcano Watch is a weekly newsletter issued by the U.S. Geological Survey's Hawaiian Volcano Observatory on volcanic features on the Big Island, volcanic hazards, and informational topics of Long Valley, Montserrat, or Alaska.
Volcanoes [New Window]
This booklet presents a generalized summary of the nature, workings, publications, and hazards of the common types of volcanoes around the world, along with a brief introduction to the techniques of volcano monitoring and research.
Volcanoes of Hawaii feature stories archive [New Window]
Archive of feature stories on volcanic features on the Big Island, guided tours of Hawaii Volcanoes National Park, eruptions and eventful earthquakes, and other topics about the work of scientists at the Hawaiian Volcano Observatory.
Volcanoes of Hawaii photo gallery [New Window]
Images of Hawaiian volcanoes and the islands they've built in the past few million years, and images of recent eruptions.
Volcanoes of the United States [New Window]
Booklet detailing plate tectonics, eruptions, hazards, and monitoring of U.S. volcanoes with black and white photos.
Volunteer Program of the Hawaiian Volcano Observatory (HVO) [New Window]
Site for the Volunteer Program at the Hawaiian Volcano Observatory (HVO) with information on how to become a volunteer, volunteer housing, examples of volunteer experiences, available volunteer projects, and about HVO.
Water co-produced with coalbed methane in the Powder River Basin, Wyoming: preliminary compositional data [New Window]
Compositional data on water from 47 CBM wells sampled in the Powder River Basin, Wyoming. Data on major, minor, and trace elements are included.
Water resources of Michigan - programs and projects [New Window]
Brief descriptions of categories of USGS research programs and projects on water resources in Michigan with links to more detailed information on projects.
Water resources of North Carolina - current district projects [New Window]
Links to description, publications, data, and maps for research projects on North Carolina water resources.
Water science for schools: land subsidence [New Window]
Site for elementary school studies on land subsidence with links to land subsidence in California, wells, ground water quality, sinkholes, glossary, and a random link.
Water science for schools: the Earth's water - ground water [New Window]
Educational site for elementary schools students on ground water sources, ground water flow, and aquifers.
Water-Level Changes in the High Plains Aquifer, Predevelopment to 2002, 1980 to 2002, and 2001 to 2002 [New Window]
Data from some 7,000 wells monitoring annual water level changes in the High Plains aquifer indicting changes in water level 1980 to 2002.
West-central Florida erosion study [New Window]
West central Florida erosion interactive map with GIS datasets to download including geologic interpretative layers, samples, bathymetry, and imagery.
Western Mineral Resources [New Window]
Western Mineral Resources home page with links to projects to assess the mineral resources and mineral related environmental problems of the western region of the United States. Also links to products, offices, facts, FAQs and newsletter.
Western Region Mineral Resources Project listing [New Window]
Links to ongoing mineral resources projects in the Western Region of the United States plus links to offices and staff of the Western Mineral Resources Team.
Western Region geologic information [New Window]
Links to geologic information on western states: Alaska, Arizona, California, Hawaii, Idaho, Nevada and Oregon including information on coastal and marine geology, mineral resources, earthquakes, landslides, earthquake hazards and geologic maps.
Western lake catchment systems - Bear Lake region, Idaho-Utah [New Window]
Homepage for project on Bear Lake, Idaho-Utah, to study past climate change and effect on lake catchment basins. Includes link to summary, personnel, geology, methods used including coring and seismic surveying, and publications.
What is an Ocean Bottom Seismometer? [New Window]
Description and uses of the Ocean Bottom Seismometer; a self contained data-acquisition system which free falls to the ocean floor and records seismic data generated by airguns and earthquakes.
World Coal Quality Inventory (WoCQI) [New Window]
Homepage of the World Coal Quality Inventory (WoCQI) with sample collection procedures.
World Petroleum Assessment 2000: description and results [New Window]
World Petroleum Assessment 2000 estimates of the quantities of conventional oil, gas, and natural gas liquids outside the United States that have the potential to be added to reserves in the next 30 years (1995 to 2025).
World petroleum assessment [New Window]
A rigorous geologic foundation for estimating world undiscovered energy resources. Links to world energy resources text and maps (PDF format), total petroleum system (TPS), and world geologic maps.
Yellowstone Volcano Observatory (YVO) [New Window]
Homepage of the Yellowstone Volcano Observatory with links to information about the observatory at Yellowstone National Park, volcanic history, photo gallery, monitoring data, publications and products, and Frequently Asked Questions (FAQs).
usSEABED (marine sediment and rock distribution) [New Window]
Data on sediment and rock distributions in the waters off the United States, shown using an internet map service with links to downloadable data files


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