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Wyoming State Geological Survey -- Wyoming Stratigraphy





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Wind River Basin (Entire Geological Time Period)

Wind River Basin (Entire Geological Time Period) Footnotes (14) Footnotes (6) Footnotes (31) Footnotes (52) Footnotes (78) Footnotes (57) Footnotes (60) Footnotes (65) Pilot Butte is a stand out feature between Lander and Dubois, WY along HWY 287. The butte consists of the Wind River Formation, picture by Nikolaus Gribb. Wind River Formation between Riverton, WY and Sweetwater Junction along HWY 135, picture by Nikolaus Gribb. Chugwater Formation, taken along HWY 287 near Burris, WY, picture by Nikolaus Gribb. Morrison and Cloverly Formations. Siltstones (bottom) grading into conglomerates (top). The red and purple colors are from oxidized iron within the siltstones. Photo by Ryan O’Donnell. Northwest-dipping, resistant, red, crossbedded, upper part of the Cambrian Flathead Sandstone northwest of Saddle Rock, Saddle Rock 7.5’ Quadrangle. Photo by Wayne Sutherland. View of the contact between the greenish sandstone of the Tertiary Wagon Bed Formation and the overlying Tertiary White River Formation. Located south-east of the settlement of Big Sand Draw in s26 t32 r95. View looking to the north-east from 108° 09.078’W, 42° 43.172'N. Photo by Joseph F. Johnson. Conglomerate interbedded with white medium grained sandstones of the Tertiary White River Formation. Located at 108° 09.214’W, 42° 43.246'N. Photo by Wayne Sutherland. Limestone, siltstone and sandstone of the Sundance Formation overlay shale, siltstone, and massive gypsum layers the Gypsum Springs Formation. The bottom unit is the Nugget Sandstone. Located in s13 t31 r98. Looking east from 108° 29.991’W, 42° 40.008'N. Photo by Joseph F. Johnson. Limestone, siltstone and sandstone of the Sundance Formation overlay shale, siltstone, and massive gypsum layers the Gypsum Springs Formation. The bottom unit is the Nugget Sandstone. Located in s13 t31 r98. Looking east from 108° 29.991’W, 42° 40.008'N. Photo by Joseph F. Johnson. The upper portion of the Nugget Sandstone forms the red cliffs highlighted on the left. The red and white banded cliffs of the lower Bell Springs Member of the Nugget Sandstone are highlighted on the right. The upper portion and the Bell Springs Member are Jurassic and Triassic in age respectively. Located in s13/14 t31 r98. Looking west from 108° 29.991’W, 42° 40.008'N. Photo by Joseph F. Johnson. Limestone, siltstone and sandstone of the Sundance Formation overlay shale, siltstone, and massive gypsum layers the Gypsum Springs Formation. The bottom unit is the Nugget Sandstone. Located in s13 t31 r98. Looking east from 108° 29.991’W, 42° 40.008'N. Photo by Joseph F. Johnson.





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