Where: Alberta, Canada (55.5° N, 118.2° W: paleocoordinates 61.0° N, 75.7° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Clioscaphites vermiformis ammonoid zone, Bad Heart Formation (Smoky Group), Coniacian to Coniacian (89.8 - 83.6 Ma)

• STRATIGRAPHIC RELATIONS: The Bad Heart is conformable with both the overlying Puskwaskau and the underlying Kaskapau formations, pinching out toward the east and changing to iron-formation in the Clear Hills. It is approximately equivalent to the base of the First White Specks marker bed of the Colorado Group and may be correlated (Stott, 1967) with the Marshybank Member of the Wapiabi Formation of the central and northern Alberta Foothills. It is correlated with part of the Kotaneelee Formation of the Liard drainage and with part of the Labiche Formation of northeastern Alberta. AGE: Coniacian, on the basis of ammonoid and bivalve biostratigraphy. STRATIGRAPHIC POSITION: List represents formation.

• formation-level stratigraphic resolution

Environment/lithology: coastal; lithified, medium-grained, coarse, red sandstone

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 87569: authorized by Austin Hendy, entered by Austin Hendy on 19.03.2009

Creative Commons license: CC BY (attribution)