UW 3199/19B2 (Univ. WY, Laramie) (Carboniferous to of the United States)

Also known as Sando et al. Cherry Creek Loc.28

Where: Fremont County, Wyoming (42.6° N, 108.7° W: paleocoordinates 0.8° N, 39.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Anthracospirifer welleri-shawi zone, Horseshoe Member (Amsden Formation), Chesterian to Chesterian (339.4 - 314.6 Ma)

• Sandstone 45 ft above base of Amsden Fm. "Carlinia amsdeniana subzone. Late Mississippian (Chesterian)."

• 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 UW

• "Collected by W.G. Bell, 1954."

Primary reference: W. J. Sando, M. Gordon, Jr., and J. T. Dutro. 1975. Stratigraphy and geologic history of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming. United States Geological Survey Professional Paper 848A:1-83 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5694: authorized by John Alroy, entered by Mike Sommers on 15.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Strophomenata
 Productida - Productidae
Rhynchonellata
 Athyridida - Retziidae
 Athyridida - Athyrididae
Composita sigma Gordon 1975
 Terebratulida - Cranaenidae
 Spiriferida - Elythidae
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
isofilibranchian? gen. et sp. indet.
 Ostreida - Pterineidae
Leptodesma sp. Hall 1883 oyster
 Trigoniida - Schizodidae
Schizodus cf. depressus Worthen 1884 clam