Station 169 - Futagojima Fm, Takashima (Eocene of Japan)

Where: Japan (33.0° N, 129.5° E: paleocoordinates 38.4° N, 123.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Futagojima Formation, Middle Eocene (48.6 - 37.2 Ma)

• STRATIGRAPHIC RELATIONS: From the Futagojima Fm, which overlies the Koyagi Fm, and underlies the Hashima Fm. THICKNESS: From bed within lower part of formation that attains a thickness of 320 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From bed near base of formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified siltstone

• ENVIRONMENT: Shallow marine, siliciclastic environment..
• SPECIFIC LITHOLOGY: 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 71011: authorized by Austin Hendy, entered by Austin Hendy on 14.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Farly modern nomenclature, and species-level assignments.
unclassified
  -
Gastropoda
 Neotaenioglossa - Calyptraeidae
Calyptraea sp. Lamarck 1799 slipper shell
 Cerithioidea - Turritellidae
Colpospira okadai turret shell
 Sorbeoconcha - Thersiteidae
"Orthaulax" japonicus Nagao 1924 snail
 Neogastropoda - Buccinidae
? Pseudoneptunea sp. Kobelt 1882 true whelk
 Sorbeoconcha - Naticidae
"Polinices eocenica" = Neverita eocenica
"Polinices eocenica" = Neverita eocenica Nagao 1928 moon snail
Bivalvia
 Arcida - Arcidae
Arcidae indet. Lamarck 1809 clam
 Cardiida - Veneridae
Pitar hinokumai venus clam
 Solenida - Pharidae