Mason River Formation (Cretaceous to of Canada)

Also known as Anderson River, Northwest Territories Husky Bend

Where: Northwest Territories, Canada (69.7° N, 129.0° W: paleocoordinates 78.9° N, 72.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mason River Formation, Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• "The sample is probably late Campanian, but an early Maastrichtian age is possible."

• bed-level stratigraphic resolution

Environment/lithology: marine; shale

• shale from bones of associated fauna

Size classes: macrofossils, microfossils

Collection methods: Sample C-132694

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 36445: authorized by John Alroy, entered by Erin Leckey on 29.01.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Life -
Fromea fragilis
Fromea fragilis Stover and Evitt 1962 acritarchs
Dinophyceae
 Peridiniales -
Laciniadinium firmum
 Peridiniales - Peridiniaceae
Chatangiella biapertura
Reptilia
 Theropoda - Hesperornithidae
Hesperornis sp.
Hesperornis sp. Marsh 1872 avialan
not clear who reported it, but it's not this author