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: Shitakara Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)
• STRATIGRAPHIC RELATIONS: From Shitakara Fm of the Urahoro Gp, which overlies the Yubetsu Fm and is overlain by the Shakubetsu Fm, both of the Urahoro Gp (Early Oligocene). THICKNESS: From bed within unit 100-200 m thick. AGE: Early Oligocene based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From bed within middle part of the formation.
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified sandstone and lithified conglomerate
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 70738: authorized by Austin Hendy, entered by Austin Hendy on 03.04.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium sp. Linnaeus 1758 tusk shell | |
Bivalvia | |
Nemocardium ezoense Takeda 1953 cockle | |
Ostrea eorivularis Oyama and Mizuno 1958 oyster |