Central Shikoku (32607R) (Cretaceous of Japan)

Where: Japan (33.7° N, 133.8° E: paleocoordinates 40.8° N, 136.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Pseudodictyomitra carpatica other zone, C Member (Birafu Formation), Berriasian (145.0 - 139.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified mudstone

• Member C is composed of sandstone, mudstone, tuff and

•alternating beds of sandstone and mudstone. The sandstone

•is medium-grained, graded and ranging from 1 cm to 10 cm

•in thickness. Parallel and current ripple laminations are

•observed. The mudstone yielded radiolarians (32606R, 32607R,

•32608R, 32609R). This unit is approximately 280 m thick

Size classes: mesofossils, microfossils

Primary reference: T. Kozai, K. Ishida, and Y. Kondo. 2006. Radiolarians, bivalves and the J/K boundary in the Birafu Formation, southern Kurosegawa Belt, Central Shikoku, SW Japan. Geosciences Journal 10(3):217-235 [M. Aberhan/D. Wellmanns]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 116557: authorized by Martin Aberhan, entered by Daniel Wellmanns on 09.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Nassellaria - Canoptidae
Cinguloturris cylindra
Cinguloturris cylindra Kemkin and Rudenko 1993 radiolarian
 Nassellaria - Parvicingulidae
Ristola aff. cretacea, Svinitzium depressum
Ristola aff. cretacea Baumgartner 1980 radiolarian
 Nassellaria - Archaeodictyomitridae
Archaeodictyomitra tumandae
 Nassellaria - Eucyrtidiellidae
Eucyrtidiellum pyramis
Eucyrtidiellum pyramis Aita 1986 radiolarian