Geologic map of the Dillon 1°x2° quadrangle, Idaho and Montana

Online link https://geo-nsdi.er.usgs.gov/metadata/map-i/1803/h/metadata.faq.html
Description The digital ARC/INFO databases included in this website provide a GIS database for the geologic map of the Dillon 1 degree by 2 degree quadrangle of southwest Montana and east-central Idaho. The geologic map was orginally published as U.S. Geological Sur
Originators Ruppel, Edward T.; O'Neill, J. Michael; and Lopez, David A.
Publication U.S. Geological Survey Miscellaneous Investigations Series Map I-1803-H

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