Record (and inferred reconstruction) of the origin and development of the earth since its formation.
Fossils, rocks, and time [ More info] Booklet describes how paleontologists use the identification of fossils to recognize rocks of the same or different ages.
Geochronology [ More info] 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.
Geochronology (Western Earth Surface Processes Team) [ More info] Description of the methods of geochronology, the science of dating, used by USGS scientists in geological research.
Geologic glossary for National Parks [ More info] Geologic glossary containing simplified definitions for technical terms used within the USGS/National Park Service website on national parks.
Geologic history of Cape Cod, Massachusetts [ More info] 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 [ More info] Summarizes the geologic and volcanic activity of the Long Valley Caldera and Mono-Inyo Craters volcanic chain in east central California.
Geologic mapping in National Parks: National Park Service Support Project [ More info] Summaries of geologic projects in cooperation with the National Park Service including Grand Canyon National Park, Lake Mead National Recreation Area, Golden Gate National Recreation Area, Joshua Tree National Park, Yosemite National Park, and others.
Geologic time online edition [ More info] 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.
Geology and hydrogeology of the Florida Keys [ More info] 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 Chesapeake and Ohio Canal National Historical Park and Potomac River Corridor, District of Columbia, Maryland, West Virginia, and Virginia [ More info] Rocks representing a variety of tectonic and depositional environments outcrop along the canal and towpath and reveal the geologic history of the central Appalachian region from the Mesoproterozoic to Jurassic Period.
Alphabetical Index of Topics
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