Where: Japan (43.1° N, 143.8° E: paleocoordinates 43.7° N, 142.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ishiizawa Sandstone Member (Atsunai Formation), Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From Atsunai Fm, which overlies the Tokomuro Fm (Early Miocene) of the Atsunai Gp, and is overlain by the Shiranuka Fm (Late Miocene-Pliocene). THICKNESS: From bed with formation that attains a thickness of 700 m. AGE: Middle Miocene on the basis of molluscan biostratigraphy; Kawabata stage. STRATIGRAPHIC POSITION: From member at the base of the Atsunai Fm.

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, medium-grained, ferruginous sandstone

Size class: macrofossils

Collection methods: COLLECTOR: Y. Honda. REPOSITORY: Institute of Geology and Paleontology, Tohoku University, Sendai, Japan (IGPS).

Primary reference: Y. Honda. 1988. Molluscan fossils from the Atsunai Group, Kushiro Coal Field, Eastern Hokkaido, Northern Japan. Sato Ho-on Kai Special Publication (Profesoor T. Kotaka Commemorartive Volume) 351-363 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 70400: authorized by Austin Hendy, entered by Austin Hendy on 21.03.2007

Creative Commons license: CC BY (attribution)