PBDB Collection

USGS 21729-PC (Carboniferous of the United States)

Also known as Sando et al. Meadow Ranch Loc.13

Where: Carbon County, Wyoming (41.8° N, 107.3° W: paleocoordinates 2.2° N, 36.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Ranchester Member (Amsden Formation), Morrowan (323.2 - 318.6 Ma)

• Limestone bed 92.2-95.5 ft above base of Amsden Fm.

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, lenticular, concretionary, gray, yellow, sandy, cherty/siliceous dolomite and green, red shale

• ranchester: heterogenous sequence of interbedded chery dolomite and limestone, sandstone, and shale. carbonate rocks predominate; thin- to thick-bedded, fine grained to coarsely crystalling, yellowish-gray weathering dolomite and dolomitic limestone are generally much more abundant than thin-bedded, fine- to medium-grained, light-gray to purple weathering limestone. carbonate beds, particularly dolomites, contain abundant gray, brown or jasperoid chert in small nodules, irregular lenses and irregular networks. red and green shale in thin beds and partings are commonly interbedded with the carbonate rocks, particularly in the upper half, and may compose significant thicknesses of the member at some localities. thin beds of fine- to medium-grained, white to pink sandstone occur throughout the member but are most abundant in the upper half. quartz sand is also a minor constituent of some of the carbonate beds. anhydrite was reported as a minor constituent of some dolomite beds.

Reposited in the USGS

• "Collected by W.J. Sando and K.R. Moore, 1964."

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 5681: authorized by John Alroy, entered by Mike Sommers on 15.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Strophomenata
Productida - Productellidae	Scoloconcha globosa, Antiquatonia cf. coloradoensis Scoloconcha globosa Antiquatonia cf. coloradoensis
Productida - Echinoconchidae	Echinoconchus sp. Echinoconchus sp. sp. A
Rhynchonellata
Spiriferida - Spiriferidae	Anthracospirifer sp. Anthracospirifer sp. Lane 1963
Athyridida - Athyrididae	Composita ovata Composita ovata Mather 1915
Orthida - Schizophoriidae	Schizophoria aff. texana Schizophoria aff. texana
Calcisphaera
-	Calcisphaera sp. Calcisphaera sp. Williamson 1880
Calcisphaera laevis
-	Calcisphaera laevis Calcisphaera laevis Williamson 1880
Foraminifera
Palaeotextularoidea - Biseriamminidae	Lipinella sp., Globivalvulina sp. Lipinella sp. (nom. nud.) Globivalvulina sp. Schubert 1921
Fusulinoidea - Staffellidae	Pseudoendothyra sp. Pseudoendothyra sp.
Fusulinoidea - Eostaffellidae	Eostaffellina sp., Millerella sp., Millerella pressa, Millerella aff. pura, Eostaffella sp. Eostaffellina sp. Reitlinger 1963 Millerella sp. Millerella pressa Millerella aff. pura Malakova 1956 Eostaffella sp. Rauser-Chernousova 1948
Fusulinina - Earlandiidae	Earlandia sp. Earlandia sp.
Archaediscacea - Archaediscidae	Asteroarchaediscus ex gr. bachkiricus, Asteroarchaediscus sp., Neoarchaediscus sp. Asteroarchaediscus ex gr. bachkiricus Asteroarchaediscus sp. Neoarchaediscus sp.
Tetrataxoidea - Tetrataxidae	Tetrataxis sp. Tetrataxis sp. Ehrenberg 1854
Endothyroidea - Endothyridae	Endothyra ex gr. bowmani, Zellerina sp., Planoendothyra sp. Endothyra ex gr. bowmani Phillips 1846 Zellerina sp. Planoendothyra sp.