Also known as Pierre Shale (USGS D1982, D1983, D1984)

Where: Niobrara County, Wyoming (43.3° N, 104.3° W: paleocoordinates 49.7° N, 79.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Baculites baculus ammonoid zone, upper unnamed shale Member (Pierre Shale Formation), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• Pierre shale, about 260' above top of Kara member; was 93 in bed/horizon.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray, silty shale and limestone

Size class: macrofossils

Reposited in the USGS

Collection methods: mechanical,

Primary reference: J. R. Gill, W. A. Cobban, and P. M. Kier. 1966. The Red Bird Section of the Upper Cretaceous Pierre Shale in Wyoming. United States Geological Survey Professional Paper 393-A:1-73 [J. Alroy/M. Sommers/A. Clement]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 1586: authorized by John Alroy, entered by Mike Sommers on 17.05.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)