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, near top of middle third.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Collected by C.E. Kirschner in 1946; 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 158915: authorized by Matthew Clapham, entered by Matthew Clapham on 22.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Cadoceras tenuicostatum, Cadoceras wosnessenskii, Cadoceras kialagvikense, "Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki, Cadoceras doroschini
Cadoceras tenuicostatum Imlay 1953 ammonite
Cadoceras wosnessenskii Grewingk 1850 ammonite
Cadoceras kialagvikense Imlay 1953 ammonite
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki Pompeckj 1900 ammonite
Cadoceras doroschini Eichwald 1871 ammonite | |
Kepplerites (Seymourites) multus, Kepplerites (Seymourites) mcevoyi, Kepplerites (Seymourites) ingrahami
Kepplerites (Seymourites) multus McLearn 1929 ammonite
Kepplerites (Seymourites) mcevoyi McLearn 1928 ammonite
Kepplerites (Seymourites) ingrahami McLearn 1929 ammonite | |
Phylloceras (Calliphylloceras) freibrocki Imlay 1953 ammonite |