Where: Alaska (57.3° N, 156.4° W: paleocoordinates 27.2° N, 87.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kialagvik Formation, Discites (171.6 - 167.7 Ma)

• Base of shaly unit below an unconformity. Base of Docidoceras widebayense zone.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary shale

Size class: macrofossils

Collected by S.N. Daviess in 1944; 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 175615: authorized by Matthew Clapham, entered by Matthew Clapham on 19.12.2015

Creative Commons license: CC BY (attribution)