Where: Alaska (59.7° N, 153.2° W: paleocoordinates 31.5° N, 86.8° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinitna Formation, Callovian (166.1 - 163.5 Ma)
• A little above middle of the lower third of the Chinitna formation.
• 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 158711: authorized by Matthew Clapham, entered by Matthew Clapham on 22.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"? Kheraiceras parviforme n. sp." = Chinitnites parviformus
"? Kheraiceras parviforme n. sp." = Chinitnites parviformus Imlay 1953 ammonite | |
"Kheraiceras intermedium" = Iniskinites intermedius
"Kheraiceras intermedium" = Iniskinites intermedius Imlay 1953 ammonite |