Geologic Map of the Yellowstone Volcanic Field

Download the GIS file from the USGS here

Data is in the UTM Zone 12N Projection with the NAD27 Datum.

Reference:

Christiansen, R.L., 2001, The Quaternary and Pliocene Yellowstone Plateau Volcanic field of Wyoming, Idaho, and Montana, U.S. Geological Survey Professional Paper 729-G, 145 p., 3 plates, scale 1:125,000.

Download the PDF here