Loc. 26, Milk River [Foremost Mbr, Judith River Fm] (Cretaceous of Canada)

Where: Alberta, Canada (49.1° N, 110.8° W: paleocoordinates 56.4° N, 76.3° W)

• coordinate stated in text

• local area-level geographic resolution

When: Foremost Formation (Belly River Group), Middle Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Foremost [Mbr] Fm, which overlies the Early Campanian Pakowki Fm, and is overlain by the Oldman [Mbr] Fm (non-marine) of the Judith River [Fm] Gp (Late Campanian). AGE: Late Campanian on the basis of ammonite (and other groups) biostratigraphy; Middle Campanian according to Dawson et el. - Geological Atlas of the Western Canada Sedimentary Basin. STRATIGRAPHIC POSITION: From unknown position within the Foremost Fm.

•Foremost Formation is likely middle Campanian in age, see Fowler et al. 2017 supplementary data for more details on age constraints of the Foremost Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified sandstone

• ENVIRONMENT: Very shallow siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Sandstone. LITHIFICATION: lithified.

Size class: macrofossils

Preservation: original aragonite, original calcite

Reposited in the GSC

Collection methods: surface (in situ),

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 82686: authorized by Austin Hendy, entered by Austin Hendy on 31.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Yoldiidae
Yoldia dowlingi Russell and Landes 1937 clam
 Nuculida - Nuculidae
Nucula assiniboiensis Russell and Landes 1937 nut clam
 Pectinida - Oxytomidae
Pteria nebrascana Evans and Shumard 1857 scallop
 Poromyida - Poromyidae
 Pholadomyida - Pholadomyidae
Pholadomya subventricosa Meek and Hayden 1858 clam
 Thraciida - Periplomatidae
Periploma johnseni Russell and Landes 1937 clam
 Cardiida - Cardiidae
 Cardiida - Mactridae
Mactra sp. Linnaeus 1767 clam