I-641 Surficial geologic map of the Mammoth Quadrangle and part of the Gardiner Quadrangle, Yellowstone National Park, Wyoming and Montana, scale 1:62,500, 1974, ISBN 978-0-607-77415-3 Keywords: Park county, Geologic maps, , Earthquakes, Geologic Hazards, Landforms, Landslides, Yellowstone