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This guide describes two areas of observation in the Idaho-Wyoming thrust belt. The first is a 3-mi (4.9-km) long section on Teton Pass, west of Jackson, Wyoming, along Wyoming 22 (Fig. 1). The geologic map (Fig. 2) and discussion below refer to a section that stretches from 2.5 mi (4.0 km) west of the summit of Teton Pass to 0.5 mi (8.0 km) to the east. The area is depicted on the Teton Pass and Rendezvous Peak 7¼-minute Geologic Quadrangle Maps (Schroeder, 1974, 1976). The second area is along the Hoback Valley and Canyon, about 10 mi (16 km) southeast of Jackson. Observations there are along U.S. 187–189, from Hoback Junction to Granite Creek, about 11.5 mi (18.5 km) east. The area is depicted on the Camp Davis and Bull Creek 7¼-minute Geologic Quadrangles (Schroeder, 1974, 1976). Two other locations in the area are briefly described. They are both on U.S. 26–89 in the Grand Canyon on the Snake River. The first is about 3 mi (4.8 km) southwest of Hoback Junction, where the Darby thrust is exposed, the other is at Keyser Creek, about 8 mi (12.9 km) east of Alpine Junction, where the Little Greys Anticline is exposed. All locations described herein are on public land.

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