USGS "blue file" Loc. 13359 (Carboniferous of the United States)

Where: Meagher County, Montana (46.5° N, 110.4° W: paleocoordinates 4.4° N, 37.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Sections beds labelled Jurassic = first, Mississippian = last. JA: late Chesterian is Serpukhovian according to Mii et al. 1999 (GSA Bull 111:960-973)

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, black, calcareous 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.
• shale, black, fissile, very calcareous, unresistant.

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 5621: authorized by John Alroy, entered by Mike Sommers on 09.11.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Euomphalina - Euomphalidae
Amphiscapha sp. Knight 1942 snail
sp. A
Strophomenata
 Productida - Productidae
Dictyoclostus inflatus McChesney 1860
ssp. spinolinearis n. ssp.
Rhynchonellata
 Rhynchonellida - Leiorhynchidae
 Spiriferinida - Punctospiriferidae
 Spiriferida - Spiriferidae
Spirifer sp. Sowerby 1818
 Athyridida - Athyrididae
 Terebratulida - Cranaenidae
? Cranaena circularis n. sp. Easton 1962
Chondrichthyes
 Ctenacanthiformes - Ctenacanthidae
cf. Ctenacanthus indet. Agassiz 1836 elasmobranch
these are aka ichthyodorulites, fish spines