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Rutaka Bridge (Miocene of Japan)

Where: Hokkaido, Japan (43.5° N, 141.6° E: paleocoordinates 43.8° N, 140.3° E)

• coordinate stated in text

When: Tortonian (11.6 - 7.2 Ma)

• Based on these chronological information, Takano et al. [3] estimated the age of the Ichibangawa Formation (except the glauconite bed) to be approximately 11.510 Ma, and they also considered the uppermost glauconite bed of the Ichibangawa Formation to be around 109.5 Ma based on previous studies.

• bed-level stratigraphic resolution

Environment/lithology: marine; glauconitic sandstone

Size class: macrofossils

Primary reference: Y. Tanaka and N. Kohno. 2015. A New Late Miocene Odobenid (Mammalia: Carnivora) from Hokkaido, Japan Suggests Rapid Diversification of Basal Miocene Odobenids. PLoS One [M. Uhen/M. Uhen] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 172573: authorized by Mark Uhen, entered by Mark Uhen on 11.08.2015

Creative Commons license: CC BY (attribution)