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Rocks and deposits
Solid masses that make up the earth's crust as well as accumulations of materials. Use for major rock types and unconsolidated deposits. For deposits of economic value, see related terms.
Subtopics:
Fossils (13 items)
Igneous rocks (8 items)
Metamorphic rocks (2 items)
Sedimentary rocks (6 items)
Unconsolidated deposits (13 items)
Related topics:
Results 21 - 30 of 46 listed by similarity [list alphabetically]
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 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.
Information on fossils and fossil collecting [New Window]
Links to general interest publications, special references, and other sources for fossil and fossil collecting information.
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.
PDF Limestone; a crucial and versatile industrial mineral commodity [New Window]
Usefulness of limestone, problems encountered in finding and exploiting suitable limestone resources
Major fossil groups [New Window]
Discusses how fossils can be grouped and studied by size, habitat type, and phylogenetic groups. Shows how fossil classification groups are used to solve geologic problems at the USGS.
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
Megafossils: vertebrates - technique of paleontological analyses [New Window]
Brief description of vertebrates and use of their fossil bones and footprints to aid in dating strata in biostratigraphy and to decipher past climates and recreate ancient ecosystems in paleoecology, paleoclimatology and paleobiogeography.
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
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.
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