KT79-8-6D - Early Pleistocene, Yamaguchi Prefecture: Early Pleistocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Venerida - Veneridae
11 specimens
Bivalvia - Carditida - Carditidae
1 specimen
Bivalvia - Pholadida - Myidae
1 specimen
Bivalvia - Arcida - Cucullaeidae
Arca cf. boucardi Jousseaume 1894
1 specimen
Bivalvia - Arcida - Glycymerididae
2 specimens
Glycymeris sp. Da Costa 1778
3 specimens
Bivalvia - Ostreida - Ostreidae
? Crassostrea sp. Sacco 1897
1 specimen
Bivalvia - Pectinida - Pectinidae
1 specimen
see common names

Geography
Country:Japan State/province:Yamaguchi
Coordinates: 35.5° North, 131.1° East (view map)
Paleocoordinates:
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Quaternary Epoch: Pleistocene
10 m.y. bin: Cenozoic 6
Key time interval: Early Pleistocene
Age range of interval: 2.58 - 0.774 m.y. ago
Stratigraphy
Regional section:Yamaguchi
Stratigraphic resolution:bed
Stratigraphy comments: AGE: Planktonic foraminifers and nannoplankton show that the age of the Mollusca is Early Pleistocene, estimated at about 1.5 Ma.
Lithology and environment
Primary lithology: lithified calcareous "siliciclastic"
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: No lithology data reported in text, other than calcareous and rubble (suggesting lithified). A calcareous siliciclastic lithology is hence assigned. LITHIFICATION: Lithified, based on comments that material was derived from fragmented rubble.
Environment:transition zone/lower shoreface
Geology comments: BATHYMETRY: Upper sublittoral zone. THERMAL TOLERANCES: Cool water fauna. The cool to cold Omma-Manganji molluscan fauna are prevalent, however the warm-water fauna is represented by a couple taxa. Temperate to cool marine climate.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTOR: Unknown collector, perhaps T. Matsumoto (fisherman). REPOSITORY: Yamaguchi Prefectural Museum.
Taxonomic list comments:COMPLETENESS: Representative, though not necessarily retaing ecologic fidelity as material was dredged from a local area of sea floor. NOMENCLATURE: Not an authoritative publication, slightly outdated nomenclature, many taxa no identified to species resolution and limited used of sugeneric classification.
Metadata
Database number:62299
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-07-17 21:00:43 Last modified:2025-02-22 15:12:02
Access level:the public Released:2006-07-17 21:00:43
Creative Commons license:CC0
Reference information

Primary reference:
18005. K. Okamoto and M. Ibaraki. 1988. Early Pleistocene fossil Mollusca from the sea of Japan off Yamaguchi Prefecture. Saito Ho-on Kai Special Publication 1:523-532 [A. Miller/A. Hendy/P. Wagner]