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.
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.
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.
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.
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.
Homepage for a paleoseismic field study of the geologic record of prehistoric earthquakes in the Puget Lowland region to evaluate seismic hazards with links to an atlas and reports on historic earthquakes in the Washington and Oregon area.
Description of the SCAMP project to produce geologic and geophysical maps and reports that describe the geologic setting and geologic history of southern California.
U.S. Department of the Interior |
U.S. Geological Survey