USGS Loc. D13448, Niobrara Co. [Pierre Shale] (Cretaceous of the United States)

Also known as Loc. 20 (of Kennedy et al. 2000)

Where: Niobrara County, Wyoming (43.1° N, 104.5° W: paleocoordinates 49.2° N, 72.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Exiteloceras jenneyi ammonoid zone, Pierre Shale Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Pierre Shale, for which lithostratigraphic relations are not discussed. AGE: Late Campanian, on the basis of ammonoid biostratigraphy; Exiteloceras jenneyi zone. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, sideritic shale

• ENVIRONMENT: Marine siliciclastic.
• SPECIFIC LITHOLOGY: Shale, from unit of red ironstone and orange limestone concretions. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression, concretion

Collected by Cobban in 1993; reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: Cobban, 1993. REPOSITORY: USNM.

Primary reference: W. J. Kennedy, N. H. Landman, W. A. Cobban and G.R. Scott. 2000. Late Campanian (Cretaceous) heteromorph ammonites. Bulletin of the American Museum of Natural History 251:1-88 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88450: authorized by Austin Hendy, entered by Austin Hendy on 12.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to heteromorph ammonites, and other taxa from secondary publications. NOMENCLATURE: An authoritative publication, with modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Nostoceratidae
Exiteloceras jenneyi
Exiteloceras jenneyi Whitfield 1877 ammonite