Iwaya, Kasima-gun (Miocene of Japan)

Where: Japan (37.0° N, 137.0° E: paleocoordinates 39.9° N, 134.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nanao Member (Akaura Formation), Langhian (16.0 - 13.8 Ma)

• "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).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, coarse-grained, calcareous sandstone

Size class: macrofossils

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

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190757: authorized by Matthew Clapham, entered by Matthew Clapham on 16.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Dallinidae
Nipponithyris nipponensis Yabe and Hatai 1934
"Nipponithyris nipponesis var."
 Terebratulida - Terebrataliidae
Terebratalia tenuis Hayasaka 1922
 Terebratulida - Cancellothyrididae
Terebratulina sp. d'Orbigny 1847
Terebratulina tohokuensis Nomura and Hatai 1936
Terebratulina akitana Nomura and Hatai 1936