Sansaka: Early Maastrichtian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Opisthobranchiata - Cylichnidae
Cylichna sp. Lovén 1846
Gastropoda - Heterostropha - Ringiculidae
see common names

Geography
Country:Japan County:Osaka
Coordinates: 34.3° North, 135.2° East (view map)
Paleocoordinates:40.4° North, 126.0° East (Wright 2013)
Geographic resolution:outcrop
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Maastrichtian 10 m.y. bin: Cretaceous 8
*Period:Late/Upper Cretaceous *Epoch:Senonian
*International age/stage:Early/Lower Maastrichtian
Key time interval: Early Maastrichtian Ammonoid zone:  Pachydiscus aff. subcompressus
Age range of interval: 72.2 - 66 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Shindachi
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: conglomeratic sandstone
Lithology description: conglomeratic sandstone
Environment:marine indet.
Geology comments: no paleoenvironmental data
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Taxonomic list comments:gastropods only
Metadata
Also known as:NSM-PCL11-80-1; Loc. 9 in Matusmoto and Morozumi 1980
Database number:4896
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:P. Wagner Research group:marine invertebrate
Created:1999-08-29 11:37:37 Last modified:2025-02-22 15:12:02
Access level:the public Released:1999-08-29 11:37:37
Creative Commons license:CC0
Reference information

Primary reference:
303. T. Kase. 1990. Late Cretaceous gastropods from the Izumi Group of southwest Japan. Journal of Paleontology 64(4):563-578 [J. Alroy/J. Alroy/J. Alroy]