Where: Weston County, Wyoming (44.2° N, 104.7° W: paleocoordinates 43.8° N, 64.9° 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)

• 18.3 m (60 ft) beneath highest yellow concretion

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by W.W. Rubey in 1924; 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 175371: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2015

Creative Commons license: CC BY (attribution)