Dunvegan Fm (Cretaceous of Canada)

Where: Alberta, Canada (56.3° N, 119.0° W: paleocoordinates 58.3° N, 71.6° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Dunvegan Formation, Cenomanian (100.5 - 93.9 Ma)

• STRATIGRAPHIC RELATIONS: The Dunvegan Formation is overlain conformably by the Kaskapau Formation in the Peace River area, except for an apparent hiatus near Watino, Alberta where the Dunveganoceras Zone seems to be missing. The contact is usually transitional, and where the basal unit of the Kaskapau becomes overly sandy the term Sakunka Member of the Dumvegan was suggested by Spieker (1921) for such beds in the Pine River area of British Columbia. The Dunvegan is underlain conformably and transitionally by shales of the Fort St. John Group, which are referred to as Sully and Cruiser formations in northeastern British Columbia and as the Shaftesbury Formation in the Peace River plains of Alberta. The Dunvegan grades laterally to the east into the marine Labiche Formation and to the south into the middle part of the Sunkay Member of the Blackstone Formation. AGE: Cenomanian, on the basis of ammonoid and bivalve biostratigraphy. STRATIGRAPHIC POSITION: List is representative of Dunvegan Fm.

• formation-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, brown, gray, yellow sandstone

• ENVIRONMENT: Siliciclastic marine.
• SPECIFIC LITHOLOGY: Marine, nonmarine and deltaic sandstone, light grey to yellowish buff. LITHIFICATION: Poorly lithified on the basis of figured specimens.

Size class: macrofossils

Preservation: mold/impression

Reposited in the NMC

Collection methods: surface (in situ),

• COLLECTOR: Multiple collectors. REPOSITORY: National Museum of Canada.

Primary reference: F. H. McLearn. 1926. Contributions to Canadian Palaeontology: New species from the Coloradoan of Lower Smokey and Lower Peace Rivers, Alberta. Canada Geological Survey 42:117-126 [A. Hendy/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87568: authorized by Austin Hendy, entered by Austin Hendy on 19.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for marine invertebrates. NOMENCLATURE: An authoritative publication, and with relatively antiquated nomenclature but species-resolution identifications.
unclassified
  -
Gastropoda
 Cerithioidea - Thiaridae
? Pachymelania sp. White 1895 snail
Bivalvia
 Arcida - Arcidae
 Myalinida - Inoceramidae
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Mytilida - Mytilidae
 Pholadida - Corbulidae
 Cardiida - Corbiculidae
Corbicula dowlingi McLearn 1926 clam
 Cardiida - Veneridae
 Cardiida - Mactridae
Mactra sp. Linnaeus 1767 clam
 Cardiida - Solecurtidae
"Psammosolen dunveganensis" = Solecurtus
"Psammosolen dunveganensis" = Solecurtus clam
 Cardiida - Tellinidae
 Unionida - Unionidae
Unio dowlingi freshwater mussel
 Life -