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USGS 24050-PC. SW¼ sec. 26 T47N R116W Teton County (Carboniferous of the United States)

Also known as Sando et al. Gros Ventre Range Loc.159

Where: Teton County, Wyoming (43.6° N, 106.8° W: paleocoordinates 1.9° N, 36.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Horseshoe Member (Amsden Formation), Arnsbergian (326.4 - 318.1 Ma)

• Anthracospirifer welleri - shawi

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, red, silty, sandy, calcareous shale and gypsiferous, shelly/skeletal limestone

• horseshoe: predominantly fissile, platy or blocky siltstone, shale, and mudstone. weathers bright red to grayish red or purple. thin beds and lenses of platy, white to red, fine grained, commonly calcareous quartz sandstone occur sporadically throughout member. thin beds of silty, sandy, or argillaceous limestone are rare in central wy, significant proportion in western wy. dolomite is a rare constituent. limestone beds are either fine grained and unfossiliferous or fine to medium grained and contain a shelly fauna. anhydrite and gypsum present at several localities. represents offshore marine facies of the transgressing amsden sea.

Reposited in the USGS

• "Collected by M. Gordon Jr., and others, 1955."

Primary reference: M. Gordon and E. L. Yochelson. 1975. Gastropoda, Cephalopoda, and Trilobita of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming. United States Geological Survey Professional Paper 848(F):1-30 [P. Wagner/P. Wagner/P. Wagner] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 69457: authorized by Pete Wagner, entered by Pete Wagner on 26.02.2007

Creative Commons license: CC BY (attribution)