Where: Alaska (60.2° 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, middle third, from 75 to 100 ft below the sandstone unit at base of upper third
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
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 158648: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Cadoceras (Stenocadoceras) striatum n. sp. Imlay 1953 ammonite |