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
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
Scaphopoda | |
Entalis pauperculum tusk shell | |
Cephalopoda | |
Baculites mclearni Russell and Landes 1937 ammonite | |
Scaphites sp. Parkinson 1811 ammonite | |
Gastropoda | |
Anchura sp. Conrad 1860 snail | |
Polinices obliquata moon snail | |
Bivalvia | |
Nucula assiniboiensis Russell and Landes 1937 nut clam | |
Yoldia dowlingi Russell and Landes 1937 clam | |
Mactra nitidula, "Mactra warrenana" = Cymbophora warrenana
Mactra nitidula clam
"Mactra warrenana" = Cymbophora warrenana Meek and Hayden 1856 clam | |
Pholadomya mclearni Russell and Landes 1937 clam | |
Liopistha montanensis Henderson 1918 clam | |
Periploma johnseni Russell and Landes 1937 clam | |
Inoceramus subdepressus Meek and Hayden 1861 clam |