Where: Alaska (59.8° N, 153.1° W: paleocoordinates 31.5° N, 86.6° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinitna Formation, Callovian (166.1 - 163.5 Ma)
• A little below middle of the middle third of the Chinitna formation
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siltstone
Size class: macrofossils
Collected by R.W. Imlay, D.J. Miller in 1948; 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 158682: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Phylloceras (Partschiceras) subobtusiforme Pompeckj 1900 ammonite | |
Cadoceras bathomphalum, "Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki, "Cadoceras catostoma" = Cadoceras (Pseudocadoceras) catostoma, Cadoceras comma n. sp., Cadoceras wosnessenskii, Cadoceras (Paracadoceras) multiforme
Cadoceras bathomphalum Imlay 1953 ammonite
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki Pompeckj 1900 ammonite
"Cadoceras catostoma" = Cadoceras (Pseudocadoceras) catostoma Pompeckj 1900 ammonite
Cadoceras comma n. sp. Imlay 1953 ammonite
Cadoceras wosnessenskii Grewingk 1850 ammonite
Cadoceras (Paracadoceras) multiforme Imlay 1953 ammonite |