Kirimiya Fm (glauconite-bearing sst) - 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: Kirimiya Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

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

• member-level stratigraphic resolution

Environment/lithology: coastal; lithified, fine-grained, medium, glauconitic, green sandstone

• ENVIRONMENT: Shallow sea, soft-bottom siliciclastic bottom.
• SPECIFIC LITHOLOGY: Green-colored, glauconitic-bearing, fine-medium-grained sandstone. 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 70922: 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.
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
 Mytilida - Mytilidae
Brachidontes sp. Swainson 1840 mussel
 Carditida - Carditidae
Venericardia japonica Mizuno 1952 clam
"Venericardia mandaica" = Venericardia (Venericardia) mandaica Yokoyama 1911 clam
"Venericardia nipponica" = Venericardia (Venericor) nipponica Yokoyama 1911 clam
 Cardiida - Veneridae
 Nuculida - Nuculidae
Acila (Truncacila) sp. Grant and Gale 1931 divaricate nutclam
 Ptenoglossa - Epitoniidae
"Epitonium" sp. Bolten 1798 wentletrap
 Neogastropoda - Volutidae
Volutospina ? nishimurai Nagao 1928 volute