Where: Alaska (57.4° N, 156.5° W: paleocoordinates 30.7° N, 90.0° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Shelikof Formation, Callovian (166.1 - 163.5 Ma)
• Gray siltstone 20 to 40 ft below the first prominent sandstone bed at this place and about 1,000 ft above the base of the Shelikof formation.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siltstone
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 158951: authorized by Matthew Clapham, entered by Matthew Clapham on 23.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki Pompeckj 1900 ammonite | |
"Oppelia (Oxycerites) sp." = Oxycerites
"Oppelia (Oxycerites) sp." = Oxycerites Rollier 1909 ammonite |