Where: Alaska (69.5° N, 146.3° W: paleocoordinates 73.3° N, 51.9° W)

• small collection-level geographic resolution

When: Kingak Shale Formation, Late/Upper Oxfordian to Late/Upper Oxfordian (161.2 - 152.1 Ma)

• 50' below top of Kingak Shale.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, black shale and 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 5450: authorized by John Alroy, entered by Mike Sommers on 04.10.1999

Creative Commons license: CC BY (attribution)