Bedrock Geology of Yellowstone National Park

The conversion of bedrock geology information of the park into a digital format enables easy overlay with other layers for analysis and development of other themes. The bedrock geology coverage was developed from the 1972 USGS Geologic Map of Yellowstone National Park. It shows polygons of bedrock formations. Attributes attached to each polygon include a formation code, formation name, formation age, and a generalized formation name. These data are unpublished material.