Where: Alaska (59.7° N, 153.3° W: paleocoordinates 31.6° N, 86.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• 200-300 ft below top of Bowser member, 800-900 ft above Cranocephalites beds

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Reposited in the USGS

• collection was made by D. M. Hill in 1950

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 68899: authorized by Martin Aberhan, entered by Sabine Nürnberg on 13.02.2007

Creative Commons license: CC BY (attribution)