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You are browsing the archive for 27 June 2011 - Mountain Beltway.

27 June 2011

Team Rockies 2011

Our field class visited the Museum of the Rockies yesterday. Here’s the full team!

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Goose Egg / Tensleep contact

West of Shell, Wyoming, on route 14, there is a lovely exposure showing the tilted stratigraphic contact between the lower Tensleep Formation (purple; Pennsylvanian period) underneath Goose Egg Formation (orange/tan; Permian to Triassic in age). The contact dips to the west because it has been deformed during Laramide mountain-building (uplift of the Bighorn block, and downdropping of the Bighorn basin). Here’s a gigapan to show the contact:

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