USGS 22986-PC: Chesterian - Arnsbergian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Calcisphaera sp. Williamson 1880
Anthozoa - Stauriida - Aulophyllidae
? Turbinatocaninia sp. Dobrolyubova 1970
Anthozoa - Auloporida - Multithecoporidae
? Multithecopora amsdenensis
Rhynchonellata - Spiriferida - Spiriferidae
Anthracospirifer ? curvilateralis (Easton 1962)
ssp. brutus
unclassified
Bryozoa indet. Ehrenberg 1831
chaetetiform bryozoan, n. gen. A, n. sp.
Conodonta - Prioniodontida
Hibbardella sp. Bassler 1925
Conodonta - Ozarkodinida - Polygnathidae
Cavusgnathus unicornis
Conodonta - Ozarkodinida
Hindeodella sp. Bassler 1925
synonym of Ozarkodina
Eostaffellidae
Eostaffella circuli
Staffellidae
Pseudoendothyra ex gr. kremenskensis
Pseudoendothyra sp.
Archaediscidae
Neoarchaediscus sp.
Asteroarchaediscus sp.
Archaediscus ex gr. krestovnikovi
Archaediscus sp.
Endothyridae
Endothyra sp.
Endothyra ex gr. bowmani Phillips 1846
see common names

Geography
Country:United States State/province:Wyoming County:Lincoln
Coordinates: 42.9° North, 110.8° West (view map)
Paleocoordinates:1.5° North, 41.0° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Carboniferous
*Period:Early/Lower Carboniferous
*International age/stage:Pendleian - Arnsbergian *Local age/stage:Chesterian
Key time interval:Chesterian - Arnsbergian Zone: Caninia
Age range of interval:339.40000 - 318.10000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Amsden Member:Moffat Trail
Stratigraphic resolution:bed
Stratigraphy comments: Limestone 210 ft above base of Amsden Fm. "Late Mississippian (Chesterian)."
Lithology and environment
Primary lithology:dolomitic,shelly/skeletal,gray,yellow lithified "limestone"
Lithology description: moffat trail: predominantly light gray, medium to coarse grained, fossiliferous limestone composed largely of comminuted organic debris, mostly crinoidal, in beds 0.3 - 5 ft thick. brown, gray, or jasperoid chert nodules and lenses are common. thin intercalated beds of silty dolomite or dolomitic limestone that weather yellowish brown or buff occur sparsely. limestone at some localities contain considerable quantities of fine quartz sand, and some beds of fine grained quartz sandstone and quartzite are present. hoback canyon upper-half beds contain partings and beds of dark gray fissile clay shale. glory mountain member beds include ferruginous pisolites in thin crinoidal limestone. most of the larger fossils are abraded, fragmented, haphazardly oriented.
Environment:offshore shelf 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 J.T. Dutro, Jr. and Mario Suarez, 1966."
Metadata
Also known as:Sando et al. Moffat Trail Loc.75
Database number:5738
Authorizer:J. Alroy Enterer:M. Sommers
Modifier:C. Visaggi Research group:marine invertebrate
Created:1999-11-17 17:17:33 Last modified:2004-03-11 16:25:11
Access level:the public Released:2000-11-20 13:53:27
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]