Where: Alaska (60.2° N, 152.6° W: paleocoordinates 31.7° N, 86.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bowser Member (Tuxedni Formation), Callovian (166.1 - 163.5 Ma)

• at top of Bowser member, 820 ft above Cranocephalites beds; stratigraphic position is well established

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Reposited in the USGS

• collection was made by A. Grantz in 1951

Primary reference: R. W. Imlay. 1962. Jurassic (Bathonian or Early Callovian) Ammonites from Alaska and Montana. Geological Survey Professional Paper 374-C:1-32 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 68911: authorized by Martin Aberhan, entered by Sabine Nürnberg on 13.02.2007

Creative Commons license: CC BY (attribution)