USGS "blue file" Loc. 13416: Serpukhovian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Reticularina spinosa
Anthozoa - Stauriida - Hapsiphyllidae
Triplophyllites cf. spinulosus
synonym of Amplexizaphrentis
Ostracoda
Ostracoda indet. Latreille 1802
Strophomenata - Orthotetida - Orthotetidae
Orthotetes (Orthotetes) sp.
sgn. (Orthotetes)
Strophomenata - Productida - Linoproductidae
? Linoproductus duodenaris n. sp.
    = Marginovatia duodenaria Easton 1962
Gordon and Henry 1990
Recombined by Gordon and Henry, 1990
Strophomenata - Productida - Echinoconchidae
Echinoconchus angustus n. sp. Easton 1962
Echinoconchus aff. alternatus (Norwood and Pratten 1855)
Strophomenata - Productida - Productellidae
Productus fasciculatus McChesney 1860
recombined as Productus (Diaphragmus) fasciculatus
Strophomenata - Productida - Productidae
Dictyoclostus inflatus (McChesney 1860)
Rhynchonellata - Athyridida - Athyrididae
Composita sulcata Weller 1914
Craniata - Craniida - Craniidae
Crania cf. modesta White and St. John 1867
recombined as Petrocrania modesta
see common names

Geography
Country:United States State/province:Montana County:Golden Valley
Coordinates: 46.7° North, 109.1° West (view map)
Paleocoordinates:3.9° North, 36.8° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Carboniferous Epoch:Mississippian
Stage:Serpukhovian 10 m.y. bin:Carboniferous 3
*Period:Early/Lower Carboniferous *Epoch:Serpukhovian
*Local age/stage:Late/Upper Chesterian
Key time interval:Serpukhovian
Age range of interval:330.90000 - 323.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Heath
Local section:Easton Big Snowy group section #7 Local bed:44
Local order:top to bottom
Stratigraphic resolution:bed
Stratigraphy comments: Lower Heath. JA: late Chesterian is Serpukhovian according to Mii et al. 1999 (GSA Bull 111:960-973)
Lithology and environment
Primary lithology:gray,yellow lithified siltstone
Secondary lithology: claystone
Lithology description: siltstone or claystone, dark gray, weathers yellowish gray, slightly resistant.
Environment:offshore Tectonic setting:cratonic basin
Geology comments: Some of the upper Heath MAY be estuarine/non-marine as noted by the author. These localities contain wood and other plant fragments, are non-calcareous and contain no marine fossils. These localities have been omitted by me [MS].
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USGS
Metadata
Database number:5642
Authorizer:J. Alroy, N. Bonuso Enterer:M. Sommers, P. Monarrez
Modifier:J. Alroy Research group:marine invertebrate
Created:1999-11-09 15:03:43 Last modified:2006-08-06 21:32:26
Access level:the public Released:2000-11-20 13:53:27
Creative Commons license:CC BY
Reference information

Primary reference:
348. W. H. Easton. 1962. Carboniferous formations and faunas of central Montana. United States Geological Survey Professional Paper 348:1-126 [J. Alroy/M. Sommers/M. Uhen]

Secondary references:

45670 M., J.r. Gordon and T. W. Henry. 1990. Marginovatia, a Mid-Carboniferous Genus of Linoproductid Brachiopods. Journal of Paleontology 64(4):532-551 [N. Bonuso/P. Monarrez/P. Wagner]