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Geologic Map Search



Types of Geologic Maps

But how do I find what I'm looking for?

Searching for geologic or other maps that cover a given area can be complicated because maps may cover unpredicable areas (e.g. quadrangles, counties, study areas, etc.) and be at various scales. Aside from our statewide maps, most of our maps are of 7.5 minute quadrangles (search by name). Another way to locate maps is to use either our Interactive Map Portal or the USGS National Geologic Map Database which catalogs maps in various searchable ways.