USGS Geologic Map: Grassy Lake Reservoir Quadrangle, WyomingDescription: Surficial geologic map of the Grassy Lake Reservoir Quadrangle, Yellowstone National Park and Adjoining Area, Wyoming
Publisher: U.S. Geological Survey
Print Date: 1973
Scale: 1:62,500
Format: Folded
Media: One-sided paper map with color graphics.