Kamicharo Fm - KC-2: Early Miocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
Gastropoda - Naticidae
Sinum sp. Röding 1798
Bivalvia - Cardiida - Tellinidae
"Tellina" sp. Linnaeus 1758
Bivalvia - Lucinida - Thyasiridae
Conchocele bisecta (Conrad 1849)
Bivalvia - Protobranchia - Nuculidae
? Nucula sp. Lamarck 1799
see common names

Geography
Country:Japan
Coordinates: 43.1° North, 143.8° East (view map)
Paleocoordinates:43.5° North, 140.1° East (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5
Key time interval: Early Miocene
Age range of interval: 23.04 - 15.98 m.y. ago
Stratigraphy
Formation:Kamicharo
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Kamicharo Fm, which overlies the Nuibetsu Fm (Oligocene) of the Ombetsu Gp, and is overlain by the Atsunai Fm of the Atsunai Gp; correlative unit of the Tokomuro Fm. THICKNESS: From bed with formation that attains a thickness of 180 m. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within formation.
Lithology and environment
Primary lithology:tuffaceous,gray lithified sandy siltstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Alternating beds of gray siltstone, sandstone, sandy tuff, and hard shale. LITHIFICATION: Lithified, on the basis of facies description.
Environment:offshore
Geology comments: ENVIRONMENT: Assemblage appears to be derived from an offshore shelf siliciclastic environment. TEMPERATURE: Stratigraphically adjacent pollen floras indicate a cool-temperate environment.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: COLLECTOR: Y. Honda. REPOSITORY: Institute of Geology and Paleontology, Tohoku University, Sendai, Japan (IGPS).
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Authoritative publication with subgeneric and species-level assignments.
Metadata
Database number:70390
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2007-03-21 21:43:46 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2007-03-21 21:43:45
Creative Commons license:CC0
Reference information

Primary reference:
23610. Y. Honda. 1988. Molluscan fossils from the Atsunai Group, Kushiro Coal Field, Eastern Hokkaido, Northern Japan. Sato Ho-on Kai Special Publication (Profesoor T. Kotaka Commemorartive Volume) 351-363 [A. Hendy/A. Hendy]