Nagata, Kamo-gun, Izu Province (Pliocene of Japan)

Also known as IGPS loco no. So-13

Where: Shinozuka, Japan (34.7° N, 139.0° E: paleocoordinates 35.2° N, 138.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Harada Formation (Shirahama Group), Piacenzian (3.6 - 2.6 Ma)

• The nannofossil assemblage from the Harada Formation in the upper part of this group is characterized by the occurrence of Pseudoemiliania cf. lacunosa, without Reticulofenestra pseudoumbilica and Gephyrocapsa spp. (Okada, 1987). According to Blow (1969) and Okada and Bukry (1980), this group belongs to zones N19 and CN12 (early Piacenzian), according to Akimoto et al. (2012). Utagawa et al. (2015) dated andesite in the underlying Suzaki Formation at 3.62 +/- 0.16 Ma by K-Ar.

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified, tuffaceous, calcareous sandstone

Size class: macrofossils

Primary reference: K. M. Hatai. 1940. The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, Series 2 20:1-413 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190824: authorized by Matthew Clapham, entered by Matthew Clapham on 18.12.2017, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Frenulinidae
 Terebratulida - Cancellothyrididae
Terebratulina iduensis n. sp. Hatai 1936
Terebratulina sirahamensis n. sp. Hatai 1940
Echinoidea
 Camarodonta - Toxopneustidae
Pseudocentrotus stenoporus n. sp. Nisiyama 1966 sea urchin