USGS "blue file" Loc. 13415 (Carboniferous of the United States)

Where: Golden Valley County, Montana (46.7° N, 109.1° W: paleocoordinates 3.9° N, 36.8° 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, yellow siltstone and claystone

• 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].
• siltstone or claystone, dark gray, weathers yellowish gray, slightly resistant.

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 5646: 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 - Linoproductidae
Linoproductus sp.
Rhynchonellata
 Spiriferida - Spiriferidae
"Spirifer curvilateralis n. sp." = Anthracospirifer curvilateralis
"Spirifer curvilateralis n. sp." = Anthracospirifer curvilateralis Easton 1962
 Athyridida - Athyrididae
Composita ozarkana, Composita laevis, Composita sulcata
Composita laevis Weller 1914
Composita sulcata Weller 1914
Demospongiae
 Clavulina - Clionaidae
Clionolithes sp.
Clionolithes sp. Clark 1908 demosponge