Where: Alaska (68.8° N, 150.6° W: paleocoordinates 78.0° N, 94.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Seabee Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• Seabee formation, 860 feet above the base. The two ammonite faunas from the unnamed lower unit of the Seabee formation are best assigned an early Turonian age. The younger Seabee ammonite fauna can be dated with little question. It contains Scaphites delicatulus Warren and Watinoceras reesidei Warren in association with Inoceramus labiatus (Schlotheim), an assemblage known from lower Turonian rocks of Canada and the United States. The older fauna cannot differ much in age inasmuch as it also contains Inoceramus labiatus. Because of the close affinities of the new species Scaphites subdelicatulus with S. delicatulus Warren from the Inoceramus labiatus zone and S. delicatulus var. greenhornensis Cobban from the Sciponoceras gracile zone, the writers assign the older Seabee ammonite fauna to the earliest Turonian.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, concretionary shale

Size class: macrofossils

Preservation: mold/impression

Collected by E. J. Webb in 1947; reposited in the USNM

Primary reference: W. A. Cobban and G. Gryc. 1961. Ammonites from the Seabee Formation (Cretaceous) of northern Alaska. Journal of Paleontology 35:176-190 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 226970: authorized by Matthew Clapham, entered by Matthew Clapham on 13.08.2022

Creative Commons license: CC BY (attribution)