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Publications
Geologic Map Quadrangles

USGS 1:24,000 scale topographic maps are an excellent base for creating geologic maps. They are a convenient size and allow detailed portrayal of complex geology and have long been the standard base for detailed maps. Geologic maps of larger areas, like our state geologic map, are often derived from these more-detailed products.

We have several series of geologic map products at this scale, from both the bureau and from the USGS. Many of these maps are available both as printed maps and as free PDF files. Digital map files (GIS products) are available for some maps.

See: 'What is a geologic map and what are they used for?' for a discussion of geologic maps

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

Searching for geologic 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 the USGS National Geologic Map Database which catalogs maps in various searchable ways. Unfortunately this database is not currently very up to date for NM.

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Revised: 25 August, 2008

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