Futaba Area, Ashizawa Formation, Honshu: Early Coniacian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Myalinida - Inoceramidae
Bivalvia - Arcida - Glycymerididae
Bivalvia - Limida - Limidae
Limatula sp. Wood 1839
Bivalvia - Ostreida - Posidoniidae
Bivalvia - Trigoniida - Megatrigoniidae
Bivalvia - Carditida - Astartidae
Opis (Opis) sp. Defrance 1824
Bivalvia - Lucinida - Lucinidae
Myrtea ezoensis (Nagao 1957)
Bivalvia - Protobranchia - Nuculidae
Bivalvia - Protobranchia - Nuculanidae
Bivalvia - Arcida - Parallelodontidae
see common names

Geography
Country:Japan State/province:Fukushima
Coordinates: 37.7° North, 141.0° East (view map)
Paleocoordinates:45.7° North, 140.9° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Cretaceous Epoch: Late Cretaceous
Stage: Coniacian 10 m.y. bin: Cretaceous 6
Key time interval: Early Coniacian
Age range of interval: 89.8 - 85.7 m.y. ago
Stratigraphy
Geological group:Futaba Formation:Ashizawa
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:39626
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:S. Nurnberg Research group:marine invertebrate
Subset of collection #:40168
Created:2004-06-01 06:38:19 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-06-01 06:38:19
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]