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Basement maps
Information resources about both Maps and atlases and Bedrock geologic units

Results 1 - 8 of 8 listed by similarity [list alphabetically]
Southern California Areal Mapping Project (SCAMP): find geologic maps [More info]
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 minute quadrangles.
Bedrock geologic map of Vermont [More info]
At a scale of 1:100,000, this map shows an uncommon level of detail for State geologic maps. Mapped rock units are primarily based on lithology, or rock type, to facilitate derivative studies in multiple disciplines.
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.
Geology of the onshore part of San Mateo County, California: a digital database [More info]
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.
National Cooperative Geologic Mapping Program [More info]
Geological mapping carried out by USGS in close cooperation with state, university, and federal partners. Includes general information about geological maps and mapping standards.
Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California [More info]
A geologic map of the Santa Barbara coastal plain region in PDF format with data in GIS format (ArcInfo export, shapefile, and TIFF)
Aquifer basics [More info]
Links to general information on water supply by aquifers based on rock types and to principal national aquifers by name.
Carolina slate belt gold deposits in Virginia, North Carolina, South Carolina, and Georgia [More info]
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.
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