Also known as USGS D50

Where: North Slope County, Alaska (70.0° N, 144.8° W: paleocoordinates 70.4° N, 143.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nuwok Member (Sagavanirktok Formation), Late/Upper Miocene to Late/Upper Miocene (11.6 - 3.6 Ma)

• Fossils from interval 210 to 258 ft below top of measured section. Section estimated to be about 7000ft thick and containing silty shale, sandstone, and mudstone occurs in Carter Creek. Fossils only found in the upper 266 feet of the section. From Chlamys nuwokensis zone

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, concretionary, calcareous sandstone and concretionary, calcareous siltstone

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying,

• Collections held at USNM, University of California, USGS (Washington) and USGS (Denver)

Primary reference: F.S. MacNeil. 1957. Cenozoic Megafossils of Northern Alaska. United States Geological Survey Professional Paper 294(C):99-126 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37998: authorized by Austin Hendy, entered by Austin Hendy on 30.03.2004, edited by Mihaela Krause

Creative Commons license: CC BY (attribution)