Where: Alaska (57.3° N, 156.4° W: paleocoordinates 30.6° N, 90.0° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Shelikof Formation, Callovian (166.1 - 163.5 Ma)
• Fossils occur in limestone concretions forming part of a coarse conglomerate from 5 to 45 ft above the top of the lower siltstone member of the Shelikof formation
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, concretionary conglomerate
Size class: macrofossils
Preservation: concretion
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 158958: authorized by Matthew Clapham, entered by Matthew Clapham on 23.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Lilloettia buckmani Crickmay 1930 ammonite
Lilloettia mertonyarwoodi Crickmay 1930 ammonite | |
Cadoceras (Stenocadoceras) stenoloboide, "Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki
Cadoceras (Stenocadoceras) stenoloboide Pompeckj 1900 ammonite
"Pseudocadoceras grewingki" = Cadoceras (Pseudocadoceras) grewingki Pompeckj 1900 ammonite |