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USGS Mesozoic 21484, Yellow Water Reservoir (Cretaceous of the United States)

Where: Petroleum County, Montana (46.9° N, 108.5° W: paleocoordinates 47.2° N, 67.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Metoicoceras mosbyense ammonoid zone, Mosby Sandstone Member (Belle Fourche Formation), Late/Upper Cenomanian (99.7 - 94.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Preservation: concretion

Collected by O.O. Mueller in 1948; reposited in the USNM

Primary reference: W. A. Cobban. 1953. Cenomanian ammonite fauna from the Mosby Sandstone of central Montana. United States Geological Survey Professional Paper 243-D:45-55 [M. Clapham/K. Okamoto/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 168064: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2015

Creative Commons license: CC BY (attribution)