Hn6202 - Miyako area [Hiraiga Fm] (Cretaceous to of Japan)

Where: Japan (39.9° N, 141.9° E: paleocoordinates 53.3° N, 140.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hiraiga Formation (Miyako Group), Late/Upper Aptian to Late/Upper Aptian (122.5 - 109.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Hiraiga Fm of the Miyako Gp. AGE: Late Aptian-Early Albian; justification not stated in text. STRATIGRAPHIC POSITION: From upper part of Orbitolina facies of the Hiraiga Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, sandy siltstone

• SPECIFIC LITHOLOGY: Gray sandy siltstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Kase

• COLLECTOR: T. Kase. REPOSITORY: Not stated in text.

Primary reference: T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91254: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Foraminifera
 Orbitolinacea - Orbitolinidae
Orbitolina sp.
Gastropoda
 Trochoidea - Ataphridae
Ataphrus (Ataphrus) yokoyamai