Beecher Island, Yuma Co [Beecher Island Mbr, Pierre Shale] (Cretaceous to of the United States)

Where: Yuma County, Colorado (39.9° N, 102.2° W: paleocoordinates 46.0° N, 78.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Beecher Island Member (Pierre Shale Formation), Early/Lower Maastrichtian to Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• AGE: Early-Late Maastrichtian, on the basis of ammonoid biostratigraphy; Baculites clinolobatus-Hoploscaphites nicolletii zone.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified limestone

Size class: macrofossils

Primary reference: M. K. Elias. 1933. Cephalopods of the Pierre Formation of Wallace County, Kansas, and adjacent area. The University of Kansas Science Bulletin 21(9):289-363 [W. Kiessling/U. Merkel/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 71838: authorized by Wolfgang Kiessling, entered by Uta Merkel on 14.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Scaphitidae
Discoscaphites conradi, "Discoscaphites abyssinus" = Hoploscaphites nicolletii
Discoscaphites conradi Morton 1834 ammonite
"Discoscaphites abyssinus" = Hoploscaphites nicolletii Morton 1842 ammonite
 Ammonitida - Baculitidae
Baculites clinolobatus n. sp. ammonite
Baculites meeki n. sp. ammonite