Puale Bay ammonoids, Level 18: Angulata, Alaska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Psiloceratidae
Badouxia canadensis (Frebold 1951)
Cephalopoda - Ammonitida - Arietitidae
Paracaloceras sp. (Spath 1923)
Paracaloceras cf. rursicostatum Frebold 1967
Cephalopoda - Ammonitida - Lytoceratidae
Eolytoceras cf. tasekoi Frebold 1967
see common names

Geography
Country:United States State/province:Alaska
Coordinates: 57.7° North, 155.4° West (view map)
Paleocoordinates:46.7° North, 91.1° West (Wright 2013)
Basis of coordinate:estimated from map
Altitude:1 meters
Geographic resolution:small collection
Time
Period: Jurassic Epoch: Early Jurassic
Stage: Hettangian 10 m.y. bin: Jurassic 1
Key time interval: Angulata Ammonoid zone:  Rursicostatum
Age range of interval: 201.4 - 199.5 m.y. ago
Stratigraphy
Formation:Talkeetna
Local section:Puale Bay Local bed:18
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Canadensis regional ammonoid zones
Lithology and environment
Primary lithology: lithified calcareous sandstone
Includes fossils?Y
Environment:deep subtidal shelf Tectonic setting:back-arc basin
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Abundance in sediment:few
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:68723
Authorizer:J. Pálfy Enterer:M. Bosnakoff
Modifier:M. Clapham Research group:marine invertebrate
Created:2007-02-05 01:56:30 Last modified:2025-02-22 15:12:02
Access level:the public Released:2007-02-05 01:56:30
Creative Commons license:CC0
Reference information

Primary reference:
19807. J. Pálfy, P. L. Smith, J.K. Mortensen and R.M. Friedman. 1999. Integrated ammonite biochronology and U-Pb geochronometry from a basal Jurassic section in Alaska. Geological Society America Bulletin 111(10):1537-1549 [J. Pálfy/M. Bosnakoff]