south side, South Saskatchewan River (Cretaceous of Canada)

Where: Saskatchewan, Canada (50.7° N, 107.4° W: paleocoordinates 57.1° N, 71.6° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Bearpaw Shale Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; argillaceous shale and gypsiferous, black carbonate

• all specimens are preserved in a heterogeneous matrix ranging from a soft clay-like material to an extremely resistant, black substance. Using x-ray powder diffraction, the latter was identified as largely apatite...gypsum encrustation and infiltration have also disrupted some bone surfaces...

Size class: macrofossils

Preservation: replaced with other

Collection methods: quarrying,

Primary reference: E. L. Nicholls, T. T. Tokaryk, and L. V. Hills. 1990. Cretaceous marine turtles from the Western Interior Seaway of Canada. Canadian Journal of Earth Sciences 27(10):1288-1298 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23368: authorized by John Alroy, entered by Jill Wertheim on 12.07.2002, edited by Erin Leckey

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
Chelonioidea indet. Baur 1893 sea turtle
Family, genus, species indet.
 Squamata - Mosasauridae
Mosasaurus conodon Cope 1881 mosasaur
partial skeleton
Plioplatecarpus primaevus Russell 1967 mosasaur
almost complete (and a second partial) skeleton and additional material