Higashi-Tanakura Group Kamitoyo Fm Molluscan Fauna Locality 18: Late Miocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Pectinida - Pectinidae
Chlamys kaneharai (Yokoyama 1926)
Dominant species at locality
see common names

Geography
Country:Japan
Coordinates: 37.5° North, 140.0° East (view map)
Paleocoordinates:37.2° North, 138.3° East (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 6
Key time interval: Late Miocene
Age range of interval: 11.63 - 5.333 m.y. ago
Stratigraphy
Geological group:Higashi-Tanakura Formation:Kamitoyo
Stratigraphic resolution:formation
Stratigraphy comments: Higbashi-Tanajura group is a marine representative of the regressive Genjigawa stage

Lithology and environment
Primary lithology:"cross stratification",coarse,shelly/skeletal,blue lithified sandstone
Secondary lithology:gray,blue tuff
Includes fossils?Y
Includes fossils?Y
Lithology description: Coarse, cross-laminated loose sandstone rich in shell fragments and quartz. A coarse tuff layer with bipiramidal quartz marks the lowermost horizon of the formation at the type locality. Another thin coarse tuff layer is found in the upper part which is bluish-gray colored and pisolite bearing.
Environment:marginal marine indet.
Geology comments: Distributed in northern end of the basin and replaced laterally by medium sandstone and fine sandstone of the Kubota formation at the margin of its distribution area, especially in the southern area.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection excludes:some microfossils
Reason for describing collection:paleoecologic analysis
Metadata
Also known as:Locality 18
Database number:52164
Authorizer:A. Miller Enterer:K. Bulinski
Modifier:K. Bulinski Research group:marine invertebrate
Created:2005-07-28 13:22:14 Last modified:2025-02-22 15:12:02
Access level:the public Released:2005-07-28 13:22:14
Creative Commons license:CC0
Reference information

Primary reference:
13978. Y. Iwasaki. 1970. The Shiobara-type Molluscan Fauna: An ecological analysis of fossil molluscs. Journal of the faculty of science, University of Tokyo, Section 2 17(3):351-444 [A. Miller/K. Bulinski/K. Bulinski]