Barrett #6 (Cretaceous of the United States)

Also known as Black Hills

Where: Crook County, Wyoming (44.7° N, 104.2° W: paleocoordinates 43.4° N, 53.0° W)

• coordinate based on nearby landmark

When: Cretaceous Formation, Early/Lower Cretaceous (145.0 - 100.5 Ma)

• Due to its late 19th century date of publication, the "Cretaceous Formation" is the highest stratigraphic resolution for this collection.

• formation-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine

• "soft sandstones, clay shales, and clays, light-gray, yellow, and shades of purplish red, [overlying] persistent carbonaceous shale with plant remains."

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Collection methods: bulk,

Primary reference: L.F. Ward. 1899. The Cretaceous formation of the Black Hills as as indicated by the fossil plants. Cretaceous Formation of the Black Hills [B. Tiffney/J. Fosdick/B. Tiffney]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34841: authorized by Bruce Tiffney, entered by Julia Fosdick on 06.10.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Gleicheniales - Matoniaceae
Pecopteris Geyleriana Brongniart 1822