USGS 21719-PC (Carboniferous to of the United States)

Also known as Sando et al. Livingston Ranch Loc.45

Where: Fremont County, Wyoming (43.7° N, 109.6° W: paleocoordinates 2.0° N, 39.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Anthracospirifer welleri - shawi zone, Horseshoe Member (Amsden Formation), Chesterian to Chesterian (335.5 - 321.8 Ma)

• Limestone 70.5 - 74 ft above top of Darwin Member. "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 USGS

• "Collected by W.J. Sando and K.R. Moore, 1964. Fossils listed by Sando 1967 p.549-550."

Primary reference: W. J. Sando, M., J.r. Gordon, 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/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5720: authorized by John Alroy, entered by Mike Sommers on 17.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Fusulinoidea - Eostaffellidae
Eostaffella sp., Eostaffellina sp.
Eostaffella sp. Rauser-Chernousova 1948
Eostaffellina sp. Reitlinger 1963
 Fusulinoidea - Staffellidae
Pseudoendothyra sp.
 Endothyroidea - Endothyridae
Endothyra sp., Zellerina discoidea
 Archaediscacea - Archaediscidae
Asteroarchaediscus sp., Neoarchaediscus sp., Planospirodiscus sp.
 Palaeotextularoidea - Biseriamminidae
Biseriella sp., Biseriella ex gr. parva
Biseriella ex gr. parva Chernysheva 1948
 Palaeotextularoidea - Palaeotextulariidae
Palaeotextularia sp.
 Fusulinina - Earlandiidae
Earlandia sp.
Gastropoda
 Murchisoniina - Gosseletinidae
Gosseletina sp.
Gosseletina sp. Fischer 1885 snail
 Neritoidea - Naticopsidae
Naticopsis sp.
Naticopsis sp. M'Coy 1844 snail
sgn. (? Jedria)
Rhynchonellata
 Spiriferida - Elythidae
Torynifer setiger
 Spiriferida - Spiriferidae
Anthracospirifer shawi
Anthracospirifer shawi Gordon 1975
ssp. shawi
 Athyridida - Athyrididae
Composita sigma
Composita sigma Gordon 1975
 Orthida - Schizophoriidae
Schizophoria aff. texana, Schizophoria depressa
Schizophoria depressa Easton 1962
Strophomenata
 Productida - Productellidae
Carlinia amsdeniana
 Productida - Productidae
? Flexaria sp., Inflatia lovei
 Productida - Monticuliferidae
Ovatia muralis
 Orthotetida - Orthotetidae
Orthotetes ? kaskaskiensis
Orthotetes ? kaskaskiensis McChesney 1860
ssp. bransonorum
Calcisphaera
  -
Calcisphaera sp.
Calcisphaera sp. Williamson 1880