USGS "blue file" Loc. 13393 (Carboniferous of the United States)

Where: Fergus County, Montana (46.9° N, 109.1° W: paleocoordinates 4.0° N, 36.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Heath Formation, Serpukhovian (330.9 - 323.2 Ma)

• Lower Heath. JA: late Chesterian is Serpukhovian according to Mii et al. 1999 (GSA Bull 111:960-973)

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray limestone and shale

• 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].
• limestone, gray, fine-grained, nodular weathering; interbedded w/shale; poorly exposed.

Reposited in the USGS

Collection methods: surface (in situ),

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5630: authorized by John Alroy, entered by Mike Sommers on 09.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Productida - Productidae
Dictyoclostus inflatus, Buxtonia arizonensis
Dictyoclostus inflatus McChesney 1860
ssp. obsoletus n. ssp.
Buxtonia arizonensis Hernon 1935
 Productida - Linoproductidae
Linoproductus sp.
Rhynchonellata
 Terebratulida - Cranaenidae
Girtyella woodworthi
 Spiriferida - Spiriferidae
Spirifer sp., "Spirifer cf. curvilateralis" = Anthracospirifer curvilateralis
Spirifer sp. Sowerby 1818
"Spirifer cf. curvilateralis" = Anthracospirifer curvilateralis Easton 1962
 Spiriferida - Martiniidae
Martinia sp.
Martinia sp. M'Coy 1844
sp. A
 Athyridida - Athyrididae
Cleiothyridina atrypoides, Composita sp.
Composita sp. Brown 1849