Scalp Creek (Jurassic of Canada)

Also known as Ya-Ha-Tinda Ranch

Where: Alberta, Canada (52.3° N, 113.8° W: paleocoordinates 38.0° N, 48.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Red Deer Member (Fernie Formation), Late/Upper Pliensbachian (189.6 - 183.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: offshore shelf; black, argillaceous limestone

• "finely laminated sediments, complete absence of bioturbation"

"cratonically derived sediments deposited under anaerobic conditions on the distal parts of a gently westward-sloping shelf marginal to the western edge of the North American craton"

crinoid from one limestone slab; impressions of ammonites found on another slab

• black argillaceous limestone

Preservation: cast

Primary reference: R. L. Hall. 1991. Seirocrinus subangularis (Miller, 1821), a Pliensbachian (Lower Jurassic) crinoid from the Fernie Formation, Alberta, Canada. Journal of Paleontology 65(2):300-307 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 4879: authorized by John Alroy, entered by John Alroy on 28.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• other exposures of the Red Deer Member yield "fish remains, the aulacocerid coleoid Atractites, entoliid bivalves, and discinid inarticulate brachiopods... rhynchoneliid and ?terebratulid brachiopods"
Show authors, comments, and common names
Crinoidea
 Isocrinida - Pentacrinitidae
Seirocrinus subangularis
Seirocrinus subangularis Miller 1821 Sea lily
Cephalopoda
 Ammonitida - Hildoceratidae
? Tiltoniceras propinquum, ? Protogrammoceras sp.
? Tiltoniceras propinquum Whiteaves 1884 ammonite
? Protogrammoceras sp. Spath 1913 ammonite
 Ammonitida - Liparoceratidae
Amaltheus stokesi
Amaltheus stokesi Sowerby 1818 ammonite