Sakinzawa Valley: Early Cenomanian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Desmoceratidae
Desmoceras kossmati Matsumoto 1942
Gastropoda - Patellogastropoda
see common names

Geography
Country:Japan
Coordinates: 44.3° North, 142.1° East (view map)
Paleocoordinates:50.6° North, 147.0° East (Wright 2013)
Geographic resolution:small collection
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Cenomanian 10 m.y. bin: Cretaceous 5
*Period:Late/Upper Cretaceous *Epoch:Gallic
*International age/stage:Early/Lower Cenomanian
Key time interval: Early Cenomanian
Age range of interval: 100.5 - 93.9 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: Middle Yezo Group

fossils from a single concretion

Lithology and environment
Primary lithology: calcareous mudstone
Lithology description: mudstones
Environment:offshore Tectonic setting:forearc basin
Geology comments: environment "deeper" than "outer shelf deposits in Cretaceous forearch basin"

fossils from "an erratic cobble-sized calcareous concretion"

Taphonomy
Modes of preservation:body,concretion
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Also known as:NSM PCL3-35-1; Locality 6
Database number:4875
Authorizer:J. Alroy Enterer:J. Alroy
Research group:marine invertebrate
Created:1999-08-28 10:44:35 Last modified:2025-02-22 15:12:02
Access level:the public Released:2000-11-20 13:53:24
Creative Commons license:CC0
Reference information

Primary reference:
293. T. Kase and Y. Shigeta. 1996. New species of Patellogastropoda (Mollusca) from the Cretaceous of Hokkaido, Japan and Sakhalin, Russia. Journal of Paleontology 70(5):762-771 [J. Alroy/J. Alroy/J. Alroy]