Hd0001 - Hidaka area [lower Yezo Gp] (Cretaceous of Japan)

Where: Japan (43.0° N, 142.5° E: paleocoordinates 51.9° N, 141.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Yezo Group, Early/Lower Albian (112.0 - 109.0 Ma)

• STRATIGRAPHIC RELATIONS: From unknown formation in the Yezo Gp. AGE: Lower Albian. STRATIGRAPHIC POSITION: From limestone lenses, 5-7 m thick, 7 m, apart from one another in the lower part of the Yezo Gp.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified limestone and sandstone

• SPECIFIC LITHOLOGY: Thin alternations of sandstone and siliceous shale with intercalations of two lenses of Orbitolina-bearing limestone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Shikama

• COLLECTOR: T. Shikama. 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 91251: 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
 Heterostropha - Nerineidae
Adiozoptyxis hidakensis