Where: Japan (42.9° N, 143.8° E: paleocoordinates 43.7° N, 141.9° E)
• outcrop-level geographic resolution
When: Tokmuro Formation, Early/Lower Miocene (23.0 - 16.0 Ma)
• STRATIGRAPHIC RELATIONS: From Tokomuro Fm, which overlies the Nuibetsu Fm (Oligocene) of the Ombetsu Gp, and is overlain by the Atsunai Fm of the Atsunai Gp. THICKNESS: From bed with formation that attains a thickness of 180 m. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within formation.
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified, tuffaceous, gray, sandy siltstone
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 70388: authorized by Austin Hendy, entered by Austin Hendy on 21.03.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium sp. Linnaeus 1758 tusk shell | |
Bivalvia | |
Yoldia (Yoldia) sagittalia Yokoyama 1925 clam |