National geologic map database for Colorado - partial GREAT RESOURCE

[johnnysau]

https://ngmdb.usgs.gov/Prodesc/proddesc_68589.htm johnnysau

 

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[Clay Diggins]

That's the low resolution 1:500,000 version Johnny. If you are looking for in depth geology you can get the full interactive version with faults and dikes for Colorado and 47 other States at Land Matters. There are even links to download the much higher resolution 1:24,000 geologic maps for any area right from the map.

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