Where: Alaska (59.7° N, 153.4° W: paleocoordinates 31.5° N, 86.9° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinitna Formation, Callovian (166.1 - 163.5 Ma)
• Chinitna formation, from 100 ft of siltstone lying 200 ft below top.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Collected by A. Grantz, J.K. Hartsock 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 158914: authorized by Matthew Clapham, entered by Matthew Clapham on 22.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Phylloceras (Partschiceras) subobtusiforme Pompeckj 1900 ammonite | |
"Xenocephalites hebetus" = Xenocephalites vicarius, Lilloettia stantoni
"Xenocephalites hebetus" = Xenocephalites vicarius Imlay 1953 ammonite
Lilloettia stantoni Imlay 1953 ammonite | |
Cadoceras comma Imlay 1953 ammonite
Cadoceras wosnessenskii Grewingk 1850 ammonite |