Loc. 30, St Mary River, upper [Bearpaw Fm] (Cretaceous of Canada)

Where: Alberta, Canada (49.4° N, 112.8° W: paleocoordinates 57.1° N, 78.4° 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 the Arctica bed and above, upper Bearpaw Fm.

• group of beds-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 82641: 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.
 Myalinida - Inoceramidae
 Ostreida - Pteriidae
Pteria linguiformis pearl oyster
 Ostreida - Bakevelliidae
 Mytilida - Mytilidae
Crenella elegantula Meek and Hayden 1862 mussel
 Cardiida - Arcticidae
 Cardiida - Cardiidae
 Poromyida - Poromyidae
 Lucinida - Mactromyidae
Clisocolus moreauensis Meerk and Hayden 1861 clam
 Ammonitida - Placenticeratidae
 Ammonitida - Baculitidae
Baculites compressus Say 1920 ammonite
Baculites pseudovatus Elias 1933 ammonite