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| SITE LISTINGS |
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| Alphabetical | By Popularity | | - Alabama Geological Survey
 - Alaska Division of Geological and Geophysical Surveys
- Determining the potential of Alaskan land for geologic resources and hazards. - Arizona Geological Survey@
- California Geographical Survey
- Includes electronic map library, and other geographic resources. Part of the department of Geography of California State University. - Colorado Geological Survey (CGS)
 - Idaho Geological Survey
- Serving the state of Idaho through geologic research, earth science education, data collection, and publication. - Illinois Geological Survey
 - Iowa Geological Survey Bureau
- Collects and manages information on the geology and water resources of Iowa. - Kansas Geological Survey
 - Maryland Geological Survey
- Concentrates on the physical structure of the State of Maryland, particularly on coastal and estuarine research. - Minnesota Geological Survey
 - Nevada Bureau of Mines and Geology
- State geological survey, operated as a research and public service unit of the University of Nevada. - New Jersey Geological Survey
 - Oklahoma Geological Survey
- State agency for research and public service. - Pennsylvania Topographic and Geologic Survey
- Explores, collects, preserves, and disseminates impartial information on the state's geology, geologic resources, and topography. - South Dakota Geological Survey
 - Utah Geological Survey
- Investigates geologic hazards, mineral, energy, water, and palaeontological resources, and provides geologic and topographic information. - West Virginia Geological and Economic Survey
- Provides information about the West Virginia's energy resources including coal, gas, and oil. Also find topographic, geologic, resource, and reference maps, information about geologic hazards, earth science education resources, and more.
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