Iwaya, Kasima-gun: Langhian, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Terebratulida - Cancellothyrididae
Terebratulina sp. d'Orbigny 1847
Terebratulina tohokuensis Nomura and Hatai 1936
Terebratulina akitana Nomura and Hatai 1936
Rhynchonellata - Terebratulida - Terebrataliidae
Terebratalia tenuis (Hayasaka 1922)
Rhynchonellata - Terebratulida - Dallinidae
Nipponithyris nipponensis Yabe and Hatai 1934
"Nipponithyris nipponesis var."
see common names

Geography
Country:Japan
Coordinates: 37.0° North, 137.0° East (view map)
Paleocoordinates:36.8° North, 134.4° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
Stage: Langhian 10 m.y. bin: Cenozoic 5
Key time interval: Langhian
Age range of interval: 15.98 - 13.82 m.y. ago
Stratigraphy
Formation:Akaura Member:Nanao
Stratigraphic resolution:group of beds
Stratigraphy comments: "Nanao beds", now Nanao member of Akaura Formation. Glauconitic beds overlying the Akaura Formation have a maximum age of 14.8-14.5 Ma, based on diatom Denticulopsis hyalina (Hamada, 1996). Nanao calcareous sandstone is given a middle Miocene age (Fuji, 1969).
Lithology and environment
Primary lithology:coarse poorly lithified calcareous sandstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:190757
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2017-12-16 23:21:19 Last modified:2025-02-22 15:12:02
Access level:the public Released:2017-12-16 23:21:19
Creative Commons license:CC0
Reference information

Primary reference:
64049. K. M. Hatai. 1940. The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, Series 2 20:1-413 [M. Clapham/M. Clapham]