These maps cover 1 degree of latitude by 2 degrees of longitude and are the standard series for intermediate-scale geologic mapping. In this series, one inch on the map represents 250,000 inches, or about 4 miles, on the ground.

Move cursor over colored areas on location map on left to preview map image on right.
Click on location to download pdf map. to view pdf files.

Note: These are large pdf files (anywhere from 2 to 11 MB) and may take awhile to load depending on your Internet connection.

As you move cursor over map location, map name will appear here.