Loc. 18, Bear Gulf [upper Pawkowki Fm] (Cretaceous of Canada)

Where: Alberta, Canada (49.0° N, 111.1° W: paleocoordinates 56.9° N, 77.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Pawkowki Formation, Early/Lower Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Pawkowki Formation, which overlies the Early Campanian Milk River Formation, is equivalent to the Lea Park Fm, and is overlain by the Judith River Fm (Late Campanian). AGE: Early Campanian on the basis of ammonite (and other groups) biostratigraphy; Baculites obtusus biozone. Early Campanian according to Dawson et el. - Geological Atlas of the Western Canada Sedimentary Basin. STRATIGRAPHIC POSITION: From the upper Pakowki Fm.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified shale

• ENVIRONMENT: Offshore siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Shale. LITHIFICATION: Poorly lithified.

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 82676: authorized by Austin Hendy, entered by Austin Hendy on 31.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalvia, gastropoda, scaphopoda, and cephalopoda.
Scaphopoda
  -
Cephalopoda
 Ammonitida - Baculitidae
Baculites mclearni Russell and Landes 1937 ammonite
 Ammonitida - Scaphitidae
Scaphites sp. Parkinson 1811 ammonite
Gastropoda
 Sorbeoconcha - Aporrhaidae
Anchura sp. Conrad 1860 snail
 Sorbeoconcha - Naticidae
Bivalvia
 Nuculida - Nuculidae
Nucula assiniboiensis Russell and Landes 1937 nut clam
 Nuculanida - Yoldiidae
Yoldia dowlingi Russell and Landes 1937 clam
 Cardiida - Mactridae
Mactra nitidula, "Mactra warrenana" = Cymbophora warrenana
"Mactra warrenana" = Cymbophora warrenana Meek and Hayden 1856 clam
 Pholadomyida - Pholadomyidae
Pholadomya mclearni Russell and Landes 1937 clam
 Poromyida - Poromyidae
Liopistha montanensis Henderson 1918 clam
 Thraciida - Periplomatidae
Periploma johnseni Russell and Landes 1937 clam
 Myalinida - Inoceramidae
Inoceramus subdepressus Meek and Hayden 1861 clam