Ross Creek, Arctica bed [Bearpaw Fm] (Cretaceous of Canada)

Where: Alberta, Canada (49.9° N, 110.3° W: paleocoordinates 57.0° N, 75.3° W)

• coordinate stated in text

• local area-level geographic resolution

When: Bearpaw Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Bearpaw [Shale] Formation, which overlies the Late Campanian Oldman Formation (brackish to non-marine), andis overlain by the Eastend Fm (Maastrichtian). AGE: Late Campanian on the basis of ammonite (and other groups) biostratigraphy; Baculites compressus biozone. STRATIGRAPHIC POSITION: From Arctica bed, about middle of Bearpaw Fm.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, gray shale and lithified, concretionary shale

• ENVIRONMENT: Offshore siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Dark grey shale, with occasional concretions. LITHIFICATION: Poorly lithified shales, but with fossiliferous lithified concretions.

Size class: macrofossils

Preservation: cast, mold/impression, original calcite

Collected by Russell & Landes in 1934-1936; reposited in the GSC

Collection methods: surface (in situ),

• COLLECTOR: L.S. Russell and R. W. Landes. REPOSITORY: Geological Survey of Canada (GSC)

Primary reference: L. S. Russell and R. W. Landes. 1937. Geology of the Southern Alberta Plains. Part II. Paleontology of the marine formations of the Montana Group. Geological Survey of Canada Memoir 221 [A. Hendy/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 82640: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, scaphopoda, and cephalopoda.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Placenticeratidae
Placenticeras meeki