USGS Loc. M11670, Vermilion Creek [Mancos Shale] (Cretaceous of the United States)

Where: Moffat County, Wyoming (40.8° N, 108.9° W: paleocoordinates 43.5° N, 73.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Scaphites whitfieldi ammonoid zone, Mancos Shale Formation, Late/Upper Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Mancos Fm, which overlies the Dakota Sandstone, and is overlain by the Iles Fm of the Mesaverde Group. AGE: Albian-Coniacian for entire formation. Here assigned to Late Turonian on the basis of ammonoid and bivalve biostratigraphy (by enterer); Scaphites whitfieldi zone. STRATIGRAPHIC POSITION: From top of Vermilion Creek section, at 475 ft above base of section.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary sandstone

• ENVIRONMENT: Marine siliciclastic.
• SPECIFIC LITHOLOGY: Dark, reddish-brown sandstone concretions. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Preservation: concretion

Collected by Reeside; reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: J. B. Reeside. REPOSITORY: Presumably USNM of USGS.

Primary reference: J. B. Reeside. 1955. Revised interpretation of the Cretaceous section on Vermilion Creek, Moffat County, Colorado. Wyoming Geological Association Guidebook - 1955 85-88 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 87755: authorized by Austin Hendy, entered by Austin Hendy on 24.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for marine invertebrate groups. NOMENCLATURE: Not an authoritative publication, with relatively antiquated nomenclature, but species-resolution identifications.
Chondrichthyes
 Lamniformes - Anacoracidae
"? Corax sp." = Squalicorax
"? Corax sp." = Squalicorax Whitley 1939 crow shark
Bivalvia
 Myalinida - Inoceramidae
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
Cephalopoda
 Ammonitida - Collignoniceratidae
Prionocyclus sp. Meek 1876 ammonite
 Ammonitida - Scaphitidae
Scaphites whitfieldi Cobban 1951 ammonite