Also known as USGS 7230
Where: North Slope County, Alaska (70.0° N, 144.7° W: paleocoordinates 70.5° N, 143.2° W)
• outcrop-level geographic resolution
When: Nuwok Member (Sagavanirktok Formation), Late/Upper Miocene to Late/Upper Miocene (11.6 - 3.6 Ma)
• 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 Arctica carteriana 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 37992: authorized by Austin Hendy, entered by Austin Hendy on 30.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
? Buccinum sp. Linnaeus 1758 true whelk | |
Bivalvia | |
"Cardita (Cyclocardia) nuwokensis" = Cyclocardia
"Cardita (Cyclocardia) nuwokensis" = Cyclocardia clam | |
Astarte sp. Sowerby 1816 clam |