Shaviovik River (USGS Mes. loc. 21027) (Jurassic to of the United States)

Where: Alaska (69.4° N, 146.5° W: paleocoordinates 73.5° N, 52.4° W)

• small collection-level geographic resolution

When: Kingak Shale Formation, Late/Upper Oxfordian to Late/Upper Oxfordian (161.2 - 150.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, black shale and ironstone

• "[These sediments] were deposited in an eastward-trending trough about 150 mi wide...the trough was bounded on the S by a rising landmass from which most of the sediments were derived. It was bounded on the N by the Barrow Platform..."

[ergo, foreland basin]

• black shale containing nodules and interbeds of ironstone and some limestone

Reposited in the USGS

Primary reference: R. W. Imlay. 1955. Characteristic Jurassic Mollusks from northern Alaska. United States Geological Survey Professional Paper 274-D:69-96 [J. Alroy/M. Sommers]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5232: authorized by John Alroy, entered by Mike Sommers on 02.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Phylloceratida - Phylloceratidae
"Phylloceras (Macrophylloceras) sp." = Macrophylloceras
"Phylloceras (Macrophylloceras) sp." = Macrophylloceras ammonite
sgn. (Macrophylloceras)
Bivalvia
 Pectinida - Buchiidae
"Aucella rugosa" = Buchia rugosa
"Aucella rugosa" = Buchia rugosa Fischer 1837 scallop