Cliff outcrops of Cambrian and Ordovician rocks. View is south from Bighorn Pass in the Gallatin Range. Yellowstone National Park, Wyoming. Circa 1967.

Album caption and index card: Cliff outcrops of Cambrian and Ordovician rocks, viewed southward from Bighorn Pass, Gallatin Range. On right, lower cliff is Pilgrim Limestone; middle platy beds are Sage Limestone member of Snowy Range Formation; upper cliff is Bighorn Dolomite. Cliffs in cirque headwall (center left) are part of Indian Creek laccolith. Yellowstone National Park, Wyoming. Circa 1967. Published as Figure 7 in U.S. Geological Survey. Professional Paper 729-A. 1972. Note: Photos ret00205 and ret00206 form a panorama.