Image: ClarksForkoftheYellowstone-1922
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Description: 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
Title: ClarksForkoftheYellowstone-1922
Credit: Downloaded from USGS Photo Archive: http://libraryphoto.cr.usgs.gov/htmllib/btch277/btch277j/btch277z/btch277/awc01203.jpg
Author: W.C. Alden
Usage Terms: Public domain
License: Public domain
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