Where: Crook County, Wyoming (44.3° N, 104.8° W: paleocoordinates 43.9° N, 65.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Metoicoceras mosbyense ammonoid zone, Belle Fourche Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• Ferruginous concretions 7.6-10.7 m (25-35 feet) below top

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, ferruginous siliciclastic sediments

Size class: macrofossils

Preservation: concretion

Collected by E.A. Merewether in 1971; reposited in the USNM

Primary reference: W. J. Kennedy and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the western interior of the USA. Palaeontology 33:379-422 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175424: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2015, edited by Pete Wagner

Creative Commons license: CC BY (attribution)