Osakabe Area, Yamaoku Formation, Honshu: Toarcian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Bakevelliidae
Bivalvia - Pectinida - Oxytomidae
Bivalvia - Venerida - Neomiodontidae
Bivalvia - Protobranchia - Nuculanidae
see common names

Geography
Country:Japan State/province:Okayama
Coordinates: 35.1° North, 133.6° East (view map)
Paleocoordinates:45.5° North, 156.8° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Jurassic Epoch: Early Jurassic
Stage: Toarcian 10 m.y. bin: Jurassic 3
Key time interval: Toarcian
Age range of interval: 184.2 - 174.7 m.y. ago
Stratigraphy
Formation:Yamaoku
Stratigraphic resolution:formation
Stratigraphy comments: Toarcian (or thereabout)
Lithology and environment
Primary lithology: "siliciclastic"
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:40615
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-26 09:32:02 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-06-26 09:32:02
Creative Commons license:CC0
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]