Also known as Loc. #21; 50AMg69
Where: North Slope County, Alaska (68.7° N, 161.2° W: paleocoordinates 76.2° N, 35.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Okpikruak Formation, Valanginian (139.8 - 132.9 Ma)
• Valanginian in age. Probably upper part of the Okpikruak Formation, but possibly from Torok Formation.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified shale
Size class: macrofossils
Reposited in the USGS
Collection methods: quarrying,
• Collections reposited in USGS and USNM collections. Collected by M.D. Magnus, 1950.
Primary reference: R. W. Imlay. 1961. Characteristic lower Cretaceous megafossils from northern Alaska. United States Geological Survey Professional Paper 335 [A. Miller/A. Hendy/M. Clapham]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 44360: authorized by Austin Hendy, entered by Austin Hendy on 08.09.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Lytoceras sp. Suess 1865 ammonite |