Saburaishi Mbr, Kirimiya Fm - Isahaya (Eocene of Japan)

Where: Japan (32.8° N, 130.0° E: paleocoordinates 39.7° N, 125.2° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Saburaishi Member (Kirimiya Formation), Late/Upper Eocene (37.2 - 33.9 Ma)

• STRATIGRAPHIC RELATIONS: From Saburaishi Mbr of the Kirimiya Fm, which regionally overlies the Middle Eocene Keya Fm, and underlying the Nagayo Fm (Early Oligocene). THICKNESS: From member within formation that attains a thickness of ~100 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Composite list for member in the lower part of this local area.

• member-level stratigraphic resolution

Environment/lithology: coastal; lithified, sandy siltstone

• ENVIRONMENT: Shallow sea, soft-bottom siliciclastic bottom.
• SPECIFIC LITHOLOGY: Sandy siltstone. LITHIFICATION: Presumed lithified on the basis of age.

Size class: macrofossils

Collection methods: surface (float),

• COLLECTOR: A. Mizuno (c. 1964). REPOSITORY: Not stated in text, unknown.

Primary reference: A. Mizuno. 1964. Paleogene and Early Neogene molluscan faunae in West Japan. Geological Survey of Japan Report 204 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 70923: authorized by Austin Hendy, entered by Austin Hendy on 11.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Farly modern nomenclature, and species-level assignments.
Bivalvia
 Carditida - Carditidae
"Venericardia ? mandaica" = Venericardia (Venericardia) mandaica
"Venericardia ? mandaica" = Venericardia (Venericardia) mandaica Yokoyama 1911 clam
 Cardiida - Veneridae
 Thraciida - Periplomatidae
Periploma sp. Schumacher 1816 clam
 Protobranchia - Nuculanidae
Saccella sp. Woodring 1925 pointed nut clam
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell