Where: Japan (43.3° N, 144.1° E: paleocoordinates 45.0° N, 141.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Soun Mudstone Member (Yubetsu Formation), Early/Lower Oligocene (33.9 - 28.4 Ma)

• STRATIGRAPHIC RELATIONS: From Soun Mudstone Mbr of the Yubetsu Fm of the Urahoro Gp, which overlies the Rushin Fm and is overlain by the Shitakara Fm, both of the Urahoro Gp (Early Oligocene). THICKNESS: From bed within unit 250-500 m thick. AGE: Early Oligocene based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone and lithified siltstone

Size class: macrofossils

Collection methods: COLLECTOR: Presumably Y. Honda (c. 1989). REPOSITORY: Probably Tohoku University, Japan.

Primary reference: Y. Honda. 1989. Paleogene molluscan faunas from the Kushiro Coal Field, Eastern Hokkaido. Tohoku University, Science Report, 2nd series 60(1):1-137 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 70728: authorized by Austin Hendy, entered by Austin Hendy on 03.04.2007

Creative Commons license: CC BY (attribution)