Hashiura Area, Niranohama Formation, Honshu: Hettangian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Neomiodontidae
Eomiodon lunulatus
Bivalvia - Cardiida - Cardiidae
Integricardium (Yokoyamaina) hayamii Keen 1969
Bivalvia - Trigoniida - Myophorellidae
Vaugonia (Vaugonia) niranohamensis
Vaugonia (Vaugonia) namigashira
Vaugonia (Hijitrigonia) kojiwa
Bivalvia - Trigoniida - Trigoniidae
Geratrigonia hosourensis (Yokoyama 1904)
Bivalvia - Ostreida - Bakevelliidae
Bakevellia (Neobakevellia) trigona (Yokoyama 1904)
see common names

Geography
Country:Japan State/province:Miyagi
Coordinates: 39.0° North, 141.8° East (view map)
Paleocoordinates:50.0° North, 153.2° East
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Jurassic Epoch:Early/Lower Jurassic
Stage:Hettangian 10 m.y. bin:Jurassic 1
Key time interval:Hettangian
Age range of interval:201.40000 - 199.50000 m.y. ago
Stratigraphy
Geological group:Shizukawa Formation:Niranohama
Stratigraphic resolution:formation
Lithology and environment
Environment:marine indet.
Taphonomy
Modes of preservation:cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:39646
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-02 05:31:34 Last modified:2004-06-28 08:06:34
Access level:the public Released:2004-06-02 05:31:34
Creative Commons license:CC BY
Reference information

Primary reference:
10664. I. Hayami. 1975. A systematic survey of the Mesozoic Bivalvia from Japan. The University Museum, The University of Tokyo, Bulletin (10) [M. Aberhan/S. Nurnberg/S. Nurnberg]