Ipnavik River (USGS Mes. loc. 23598) (Jurassic to of the United States)

Where: Alaska (68.4° N, 157.3° W: paleocoordinates 78.0° N, 46.4° W)

• small collection-level geographic resolution

When: Tiglukpuk Formation, Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• From 100 to 150 ft above Triassic strata.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, argillaceous sandstone

• "[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]

• coarse to fine-grained graywacke.

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 5205: 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
Bivalvia
 Pectinida - Buchiidae
"? Aucella mosquensis" = Buchia piochii
"? Aucella mosquensis" = Buchia piochii Gabb 1864 scallop