USGS 5441-PC: Morrowan, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Apterinellidae indet.
Asphaltina sp. Mamet 1972
Eostaffellidae
Millerella sp.
Endothyridae
Endothyra sp.
Zellerina sp.
Endothyranella sp.
Archaediscidae
Archaediscus sp.
Asteroarchaediscus ex gr. bachkiricus
Asteroarchaediscus sp.
Neoarchaediscus ex gr. incertus
Planospirodiscus sp.
Biseriamminidae
Lipinella sp.
Pseudoammodiscidae
Pseudoglomospira sp.
Earlandiidae
Earlandia sp.
Gastropoda - Euomphalina - Euomphalidae
Straparollus (Euomphalus) aff. plummeri Knight 1934
recombined as Euomphalus plummeri
Bivalvia - Sanguinolitidae
Wilkingia terminalis (Hall 1852)
recombined as Wilkingia terminale
Bivalvia - Pectinida - Aviculopectinidae
Aviculopecten spp.
Rhynchonellata - Spiriferida - Spiriferidae
Anthracospirifer occiduus (Sadlick 1960)
Rhynchonellata - Athyridida - Athyrididae
Cleiothyridina sp. Buckman 1906
Strophomenata - Productida - Echinoconchidae
Echinoconchus informal sp. A
Strophomenata - Productida - Linoproductidae
Linoproductus eastoni
Strophomenata - Orthotetida - Derbyiidae
Derbyia cf. robusta
unclassified
Calcisphaera sp. Williamson 1880
Anthozoa - Stauriida - Neokoninckophyllidae
Neokoninckophyllum hamatilis
see common names

Geography
Country:United States State/province:Wyoming County:Carbon
Coordinates: 41.8° North, 107.3° West (view map)
Paleocoordinates:2.2° North, 36.3° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Carboniferous Epoch:Pennsylvanian
Stage:Bashkirian 10 m.y. bin:Carboniferous 4
*Period:Late/Upper Carboniferous *Epoch:Bashkirian
*Local age/stage:Morrowan
Key time interval:Morrowan Zone: Neokoninckophyllum hamatilus
Age range of interval:323.20000 - 318.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Amsden Member:Horseshoe
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology:red lithified silty,sandy,calcareous "shale"
Secondary lithology:gypsiferous,shelly/skeletal "limestone"
Lithology description: 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.
Environment:offshore Tectonic setting:cratonic basin
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:field collection,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:USGS
Collection method comments: "Collected by A.J. Collier, 1924 (?)"
Metadata
Also known as:Sando et al. Cherokee Spring Loc.1
Database number:5672
Authorizer:J. Alroy Enterer:M. Sommers
Modifier:C. Visaggi Research group:marine invertebrate
Created:1999-11-15 11:02:04 Last modified:2004-03-11 16:25:11
Access level:the public Released:1999-11-15 11:02:04
Creative Commons license:CC BY
Reference information

Primary reference:
349. 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]