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, lower part of middle third.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Collected by R.W. Juhle, R.D. Hoare 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 158910: authorized by Matthew Clapham, entered by Matthew Clapham on 22.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Phylloceras (Partschiceras) grantzi n. sp. Imlay 1953 ammonite | |
Cadoceras glabrum, Cadoceras comma, "Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki, "Cadoceras catostoma" = Cadoceras (Pseudocadoceras) catostoma
Cadoceras glabrum Imlay 1953 ammonite
Cadoceras comma Imlay 1953 ammonite
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki Pompeckj 1900 ammonite
"Cadoceras catostoma" = Cadoceras (Pseudocadoceras) catostoma Pompeckj 1900 ammonite | |
Gowericeras spinosum n. sp.
Gowericeras spinosum n. sp. Imlay 1953 ammonite |