Loc. 6, Milk River [Bear Gulch Mbr, Pawkowki Fm] (Cretaceous of Canada)

Where: Alberta, Canada (49.1° N, 111.3° W: paleocoordinates 57.3° N, 76.4° W)

• coordinate stated in text

• local area-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Bear Gulch Mbr of 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 unknown part of the Bear Gulch Mbr.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified siliciclastic sediments

• ENVIRONMENT: Offshore siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Not stated in text, but certainly siliciclastic, probably 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 82651: 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.
unclassified
  -
Bivalvia
 Pectinida - Oxytomidae
Pteria nebrascana Evans and Shumard 1857 scallop
 Ostreida - Ostreidae
Ostrea russelli Russell and Landes 1937 oyster
Ostrea albertensis Russell and Landes 1937 oyster
 Mytilida - Mytilidae
Volsella wrighti Warren 1934 mussel
 Pholadida - Corbulidae
 Cardiida - Tancrediidae
Tancredia americana Meek and Hayden 1857 clam
 Nuculida - Nuculidae
Nucula assiniboiensis Russell and Landes 1937 nut clam
Gastropoda
 Ptenoglossa - Epitoniidae
Acirsa meeki wentletrap
Cephalopoda
 Ammonitida - Baculitidae
Baculites asperiformis Meek 1876 ammonite