Where: Alaska (57.7° N, 155.7° W: paleocoordinates 30.6° N, 89.4° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Shelikof Formation, Callovian (166.1 - 163.5 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Collected by W.R. Smith in 1924; 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 158933: authorized by Matthew Clapham, entered by Matthew Clapham on 23.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Cadoceras (Stenocadoceras) stenoloboide, Cadoceras bathomphalum, Cadoceras doroschini, Pseudocadoceras petelini, Pseudocadoceras crassicostatum n. sp.
Cadoceras (Stenocadoceras) stenoloboide Pompeckj 1900 ammonite
Cadoceras bathomphalum Imlay 1953 ammonite
Cadoceras doroschini Eichwald 1871 ammonite
Pseudocadoceras petelini Pompeckj 1900 ammonite
Pseudocadoceras crassicostatum n. sp. Imlay 1953 ammonite |