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: Koyagi Formation, Middle Eocene (48.6 - 37.2 Ma)
• STRATIGRAPHIC RELATIONS: From Koyagi Fm, which unconformably overlies Mesozoic metamorphic rocks and underlies the Futagojima Fm. THICKNESS: From bed in upper 110 m of formation, which attains a total thickness of nearly 1000 m. AGE: Middle Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From bed near top of formation.
• bed-level stratigraphic resolution
Environment/lithology: estuary or bay; lithified, coarse-grained sandstone
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 70962: authorized by Austin Hendy, entered by Austin Hendy on 12.04.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
| |
Anomia sp. Linnaeus 1758 jingle | |
Gastropoda | |
Eopleurotoma ? higoensis turrid | |
Lunatia ? utoensis Nagao 1928 moon snail | |
Colpospira okadai turret shell | |
Faunus sp. Montfort 1810 snail | |
Vicarya sp. d'Archiac and Haime 1854 horn snail | |
? Bellatara sp. Strand 1928 cerith snail |