Clarks Forkofthe Yellowstone 1922
Summary
Inner box canyon of Clark Fork of the Yellowstone River, cut in Pleistocene time about 1,300 feet in granite and gneiss below the upper wall of Paleozoic rocks. Park County, Wyoming. June 12, 1922. Plate 25-A, U.S. Geological Survey Professional paper 174. 1932
Tags
Date
12/06/1922
Source
U.S. Geological Survey
Copyright info
public domain