Where: Alaska (59.8° N, 153.1° W: paleocoordinates 31.6° N, 86.6° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinitna Formation, Callovian (166.1 - 163.5 Ma)
• Chinitna formation, top of lower third.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siltstone
Size class: macrofossils
Collected by D.M. Hill, A. Grantz in 1950; reposited in the USNM
Primary reference: R. W. Imlay. 1953. Callovian (Jurassic) ammonites from the United States and Alaska Part 2. Alaska Peninsula and Cook Inlet regions. United States Geological Survey Professional Paper 249-B:41-108 [M. Clapham/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 158678: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Cadoceras wosnessenskii Grewingk 1850 ammonite |