Pointe Bleue, Lake St. John (Ordovician to of Canada)

Where: Quebec, Canada (48.6° N, 72.2° W: paleocoordinates 23.9° S, 48.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Tremblay Formation, Rocklandian to Rocklandian (460.9 - 449.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the GSC

Primary reference: A. L. McAlester. 1963. Revision of the type species of the Ordovician nuculoid pelecypod genus Tancrediopsis. Yale University Peabody Museum Postilla 74:1-19 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 184694: authorized by Pete Wagner, entered by Pete Wagner on 19.03.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Protobranchia - Ctenodontidae
Tancrediopsis cuneata Hall 1856 clam
19 right valve, 20 left valve, 60 articulated