Izumi (Kuzuryu) Area, Yambarazaka Formation, Honshu: Oxfordian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Inoceramidae
Inoceramus (Mytiloides) sp. (Brongniart 1822)
Bivalvia - Trigoniida - Trigoniidae
see common names

Geography
Country:Japan State/province:Fukui
Coordinates: 36.2° North, 136.8° East (view map)
Paleocoordinates:53.6° North, 148.5° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Jurassic Epoch: Late Jurassic
Stage: Oxfordian 10 m.y. bin: Jurassic 5
Key time interval: Oxfordian
Age range of interval: 161.5 - 154.8 m.y. ago
Stratigraphy
Geological group:Tetori Formation:Yambarazaka
Stratigraphic resolution:formation
Stratigraphy comments: including Nagano shale or "Nagano Formation" corresponding to Yambarazaka formation
Lithology and environment
Primary lithology: conglomerate
Secondary lithology: sandstone
Lithology description: conglomerate, sandstone, shale in alternation
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:39901
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Created:2004-06-12 09:22:54 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-06-12 09:22:54
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]