Where: Alaska (57.3° N, 156.4° W: paleocoordinates 27.2° N, 87.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kialagvik Formation, Early/Lower Bajocian (171.6 - 168.4 Ma)

• About 150 m below top of Kialagvik Fm

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Ralph W. Imlay, Don J. Miller in 1948; reposited in the USNM

Primary reference: G. E. G. Westermann. 1969. The ammonite fauna of the Kialagvik Formation at Wide Bay, Alaska Peninsula. Part II. Sonninia sowerbyi zone (Bajocian). Bulletins of American Paleontology 57:1-226 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175622: authorized by Matthew Clapham, entered by Matthew Clapham on 20.12.2015

Creative Commons license: CC BY (attribution)