Where: Alaska (60.1° N, 152.6° W: paleocoordinates 31.7° N, 86.2° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinitna Formation, Callovian (166.1 - 163.5 Ma)
• Chinitna formation, upper third, several hundred feet below top.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Collected by T.W. Stanton in 1904; 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 158656: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Cadoceras (Stenocadoceras) multicostatum n. sp. Imlay 1953 ammonite
Pseudocadoceras chinitnense Imlay 1953 ammonite |