Where: Chiba, Japan (35.4° N, 140.0° E: paleocoordinates 35.4° N, 140.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kiyokawa Formation (Shimosa Group), Middle Pleistocene (0.8 - 0.1 Ma)

• "A tephra marker bed from the lowermost part of the Kiyokawa Formation, Ky2, is correlated with TB7, another tephra bed from the Oiso district of Kanagawa Prefecture, which is estimated as 225 G24 Ka by the fission track dating method (Nakazato et al.,

•2004; Okazaki et al., 2004a)." (Hirayama et al. 2007)

Environment/lithology: pond; mudstone and siltstone

Size class: macrofossils

Reposited in the BMNH, MNHN

• CBM-PV - Natural History Museum & Institute, Chiba, Japan

•NSM - National Science Museum, Tokyo, Japan

Primary reference: R. Hirayama, N. Kaneko, and H. Okazaki. 2007. Ocadia nipponica, a new species of aquatic turtle (Testudines: Testudinoidea: Geoemydidae) from the Middle Pleistocene of Chiba Prefecture, central Japan. Paleontological Research 11(1):1-19 [A. Dunhill/B. Allen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 198611: authorized by Alex Dunhill, entered by Bethany Allen on 28.12.2018

Creative Commons license: CC BY (attribution)