Crossed striations on basalt of Observation Peak. Yellowstone National Park, Wyoming. Circa 1968.
Dates
Date Taken
1968
Summary
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Crossed striations on basalt of Observation Peak, atltitude 2,864 m (9,397 ft). Both sets of striations are equally fresh and date from phases of the same glaciation. The younger striations enter into the edge of the area displaying the older striations but do not obliterate them, apparently because of the flow-shadow effect illustrated on the profile section (no scale). Wyoming, ca. 1968. No index card. Published as Figure 15 in U.S. Geological Survey. Professional Paper 729-F. 1979.
Summary
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Crossed striations on basalt of Observation Peak, atltitude 2,864 m (9,397 ft). Both sets of striations are equally fresh and date from phases of the same glaciation. The younger striations enter into the edge of the area displaying the older striations but do not obliterate them, apparently because of the flow-shadow effect illustrated on the profile section (no scale). Wyoming, ca. 1968.
No index card.
Published as Figure 15 in U.S. Geological Survey. Professional Paper 729-F. 1979.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Pierce, K.L. Collection.
Rights
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