Pembina Member, Pierre Shale (Cretaceous of Canada)

Also known as Morden, Manitoba Pembina Member, Vermilion River Formation

Where: Manitoba, Canada (49.2° N, 98.1° W: paleocoordinates 53.5° N, 63.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Baculites obtusus ammonoid zone, Pembina Member (Pierre Shale Formation), Early/Lower Campanian (83.5 - 70.6 Ma)

• early Campanian, Pierre Shale also called Vermilion River Formation in older papers, but the member is the same

• member-level stratigraphic resolution

Environment/lithology: marine; black shale and ash

• The Pembina Member is a black shale rich in selenite and is lithologically very similar to the Pierre Shale. The destructive effects of selenite form by weathhering are quite evident in both formations and often result in the loss of small bones. [most material reported comes from active bentonite mines] from ref 9541 (1999)

Size classes: macrofossils, microfossils

Collection methods: Samples F74.04.06, M84.12.8, and P80.06.14

Primary reference: L. V. Hills, E. L. Nicholls, L. M. Nunez-Betelu and D. J. McIntyre. 1999. Hesperornis (Aves) from Ellesmere Island and palynological correlation of known Canadian localities. Canadian Journal of Earth Sciences 36:1583-1588 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36446: authorized by John Alroy, entered by Erin Leckey on 29.01.2004, edited by Hallie Street and Carlos Peredo

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hesperornithiformes - Hesperornithidae
Hesperornis sp. Marsh 1872 bird
not clear who reported it, but it's not this author
 Squamata - Mosasauridae
Latoplatecarpus willistoni2, "Plioplatecarpus nichollsae" = Latoplatecarpus nichollsae1
Latoplatecarpus willistoni2 Konishi and Caldwell 2011 mosasaur
"Plioplatecarpus nichollsae" = Latoplatecarpus nichollsae1 Cuthbertson et al. 2007 mosasaur
Rhiptocorys veligera
Rhiptocorys veligera Lejeune-Carpentier and Sarjeant 1983
 Peridiniales - Peridiniaceae
 Ptychodiscales - Ptychodiscaceae