Where: Fukuoka, Japan (33.9° N, 130.7° E: paleocoordinates 39.2° N, 127.1° E)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Jinnobaru Formation (Ashiya Group), Chattian (28.1 - 23.0 Ma)

• originally Chattian

•

•There is no direct dating evidence for the Jinnoharu Formation. However, fission track dating places the underlying Norimatsu Formation at 30.3 ± 1.2 Ma [214]. Foraminifera sampled above and below the Jinnoharu Formation place the latter in zone P21a/ subzone O4 [215-217], thus implying a latest Rupelian age (29.2–28.1 Ma [12, 20]).

•

•On the other hand, there is no evidence of existence of Miocene fauna of both macro- and micro-fossils from the Ashiya Group. These estimations suggest that the age of the Jinnoharu Formation is estimated to be early Late Oligocene.

• formation-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: macrofossils

Preservation: original phosphate

Primary reference: Y. Okazaki. 1995. A new type of primitive baleen whale (Cetacea; Mysticeti) from Kyushu, Japan. The Island Arc 3:432-435 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45804: authorized by Mark Uhen, entered by Mark Uhen on 03.12.2004

Creative Commons license: CC BY (attribution)