Near Ashizawa town, Iwaki City: Early Coniacian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes - Lamniformes - Anacoracidae
Chondrichthyes - Lamniformes - Mitsukurinidae
Chondrichthyes - Lamniformes - Odontaspididae
Chondrichthyes - Lamniformes - Otodontidae
Chondrichthyes - Lamniformes - Cretoxyrhinidae
Chondrichthyes - Squatiniformes - Squatinidae
Squatina sp. Dumeril 1806
Chondrichthyes - Hexanchiformes - Hexanchidae
see common names

Geography
Country:Japan
Coordinates: 37.2° North, 140.9° East (view map)
Paleocoordinates:45.2° North, 141.0° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
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
Formation:Ashizawa
Stratigraphic resolution:group of beds
Stratigraphy comments: "Early Coniacian" in text, on basis of invertebrates
Lithology and environment
Primary lithology: lithified "siliciclastic"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: Iwaki Coal and Fossil Museum (IMNH)
Metadata
Database number:277588
Authorizer:M. Clapham Enterer:M. Clapham
Research group:vertebrate
Created:2026-01-31 17:51:36 Last modified:2026-01-31 17:51:36
Access level:the public Released:0000-00-00 00:00:00
Creative Commons license:
Reference information

Primary reference:
94078. T. Uyeno and C. Suzuki. 1995. Squalicorax and some other shark teeth from an Upper Cretaceous bed in Iwaki City, Japan. Memoirs of the National Science Museum, Tokyo 28:59-64 [M. Clapham/M. Clapham]