Loc. 137 [Okinoshima Fm]: Late/Upper Eocene, Japan
collected by Kamada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya margaritacea (Sowerby 1821)
R category
recombined as Pholadomya (Bucardiomya) margaritacea
Bivalvia - Carditida - Carditidae
Venericardia nipponica Yokoyama 1911
R category
recombined as Venericardia (Venericor) nipponica
see common names

Geography
Country:Japan
Coordinates: 32.9° North, 129.6° East (view map)
Paleocoordinates:37.8° North, 125.1° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Priabonian 10 m.y. bin:Cenozoic 3
Key time interval:Late/Upper Eocene
Age range of interval:37.71000 - 33.90000 m.y. ago
Stratigraphy
Formation:Okinoshima
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Okinoshima Fm, which conformably overlies the Hashima Fm and is unconformably overlain by the Iojima Fm. AGE: Late Eocene according to foraminiferal biostratigraphy in Asano (1958), and correlated to the Sakasegawa Shale. Kobayashi and Kamada (1959) suggest that the formation could even range from Middle-Late Eocene. STRATIGRAPHIC POSITION: From bed of unknown thickness within 150 m thick formation.
Lithology and environment
Primary lithology: lithified "siliciclastic"
Lithology description: SPECIFIC LITHOLOGY: Lithology not stated in text, but is likely siliciclastic. LITHIFICATION: Lithified, on the basis of figured specimens.
Environment:offshore
Geology comments: ENVIRONMENT: Neritic sediment probably at depth of 40-50 m. Subtropical warm sea.
Taphonomy
Modes of preservation:body,cast,mold/impression
Size of fossils:macrofossils
Articulated whole bodies:some
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:paleoecologic analysis
Collectors:Kamada
Collection method comments: COLLECTOR: Y. Kamada and graduates students Nagasaki University, c. 1950's. REPOSITORY: Nagasaki and Tokyo University.
Taxonomic list comments:COVERAGE: Exhaustive for Bivalvia, Gastropoda, and Cephalopoda. NOMENCLATURE: Authoritative publication for cephalopods, but general for other taxa. Nomenclature is somewhat antiquated, but identified to species-resolution.
Metadata
Database number:81228
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2008-06-11 08:07:16 Last modified:2013-11-25 13:37:23
Access level:the public Released:2008-06-11 08:07:16
Creative Commons license:CC BY
Reference information

Primary reference:
27378. T. Kobayashi and Y. Kamada. 1959. An Eocene Nautiloid from Kyushu, Japan. Japanese Journal of Geology and Geography 30:105-125 [A. Hendy/A. Hendy]