Geologic Maps Since the 1800s, the USGS and its partners, the State Geological Surveys, have been producing high quality, standardized geologic maps of the Nation. Check out the National Geologic Map Database (NGMDB), which is the National archive of these maps and related geoscience reports.
Geologic maps of US states Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format Data for the District of Columbia is included with Maryland. Separate geologic maps are available for Alaska, Hawaii, and Puerto Rico.
- Alabama Geologic Map. Alabama rises from the coastline, its gently dipping rock layers exposing deeper and older formations in majestic order as one moves north.
- Alaska Geologic Map. Alaska is a colossal state that contains some of the world's most notable geologic features. Click the image for a larger version.
- Arizona Geologic Map. Arizona is divided roughly equally between the Colorado Plateau in the north and the Basin and Range province in the south. (more below)
- Arkansas Geologic Map. Arkansas encompasses a great variety of geology within its borders, even a public diamond mine. Arkansas stretches from the Mississippi River on its eastern edge, where historic movement of the riverbed has left behind the original state borderlines, to the more settled Paleozoic rocks of the Ouachita Mountains (the broad tan and gray lobes) on the west and the Boston Mountains to their north.
Interactive map of the United States' geology and natural resources The U.S. Geological Survey's (USGS) Mineral Resources Program's interactive Geologic Map of U.S. States provides a large amount of information on geology, natural resources, and environmental data for every U.S. state, including: Surface and bedrock geology
A browse graphic for the entire map is provided, as well as a map legend. However, files for the conterminous United States are located in one subdirectory, and files for Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands are located in a second subdirectory (see links to the right).
Preface and introduction, by the compiler.--Index to maps and charts.--The physical features of the United States, by Prof. J. D. Whitney.--The woodlands and forest systems of the United States, by Prof. William H. Brewer.--Geological map of the United States and territories, by Chas. H. Hitchcock and Wm. P. Blake.--The gold and silver mines of ...
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The SGMC is a compilation of the individual U.S. Geological Survey releases of the Preliminary Integrated Geologic Map Databases for the United States. The SGMC geodatabase also contains updated data for seven States and seven entirely new State geologic maps that have been added since the preliminary databases were published.
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Aquifers: Map of the Principal Aquifers of the United States The areal and vertical location of the major aquifers is fundamental to the determination of groundwater availability for the Nation. The map, which is derived from the Ground Water Atlas of the United States , indicates the areal extent of the uppermost principal aquifers on a ...
Geologic map at 1:500,000 scale, digitized from USGS I-1865. Includes mines, prospects, and occurrences, permissive tracts for several mineral deposit types, and gravity anomaly contours.
The map, which is derived from the Ground Water Atlas of the United States, indicates the areal extent of the uppermost principal aquifers on a national scale. In this map, a principal aquifer is defined as a regionally extensive aquifer or aquifer system that has the potential to be used as a source of potable water.