Where: Japan (39.7° N, 140.1° E: paleocoordinates 42.4° N, 137.5° E)

• outcrop-level geographic resolution

When: Nishikurosawa Formation, Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From Nishikurosawa Fm, which rests unconformably above the Daikima Flora of the Daijima Formation (Middle Miocene), and conformably below the Onnagawa Fm (Middle Miocene). THICKNESS: From restricted bed within formation of 20-100 m total thickness. AGE: Middle Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From bed within upper part of the Nishikurosawa Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, tuffaceous, brown, gray siltstone and lithified, medium-grained, pebbly sandstone

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: K. Ogasawara. REPOSITORY: IGPS, Institute of Geology and Paleontology, Tohoku University.

Primary reference: K. Ogasawara. 1973. Molluscan fossils from the Nishikurosawa Formation, Oga Peninsula, Akita Prefecture, Japan. Tohoku University, Science Report, 2nd ser. (Geol.), Special Volume (Hatai Memorial Volume) 6:137-155 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70304: authorized by Austin Hendy, entered by Austin Hendy on 20.03.2007

Creative Commons license: CC BY (attribution)