IGPS Tm-6, Kamishin, Kurosedani-mura: Burdigalian - Langhian, Japan
collected by Sotoji Imamura

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Goneplacidae
Carcinoplax antiqua (Ristori 1889)
Malacostraca - Decapoda - Cancridae
see common names

Geography
Country:Japan
Coordinates: 36.6° North, 137.1° East (view map)
Paleocoordinates:36.4° North, 134.4° East (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
Stage: Burdigalian - Langhian 10 m.y. bin: Cenozoic 5
Key time interval: Burdigalian - Langhian
Age range of interval: 20.45 - 13.82 m.y. ago
Stratigraphy
Geological group:Yatsuo
Stratigraphic resolution:group of beds
Stratigraphy comments: From the Yatsuo Formation, now elevated to group rank, composed of the Nirehara, Iwaine, Iozan, Kurosedani, and Higashibessho Formations in an ascending order. Based on the coordinates and the geological map in Yanagisawa (1999), this locality is in the upper part of the group. The Kurosedani Formation contains early to middle Miocene planktic microfossils (Tanimura, 1979). Previous studies (e.g. Hasegawa and Takahashi, 1992) had placed microfossils from this formation at the lower part of the planktic foraminifer zone N.8 of Blow (1969; Figure 3) and the lower part of the nannofossil CN3 zone of Okada and Bukry (1980). The andesitic lava in the uppermost part of the Iwaine Formation, which is in the lower part of the Yatsuo Group (Figure 2), has a K-Ar age of 16.4 ± 0.9 Ma (Shibata, 1973). The Higashibessho Formation also contains early to middle Miocene planktic microfossils (Tanimura, 1979). According to Yanagisawa’s (1999a) biochronological summary of the Yatsuo Group (Figure 3), microfossils from here correspond to the diatom NPD 3A, 3B, and 4A zones of Akiba (1986), the planktic foraminifer zone N.8 of Blow (1969) and the calcareous nannofossil CN3 zone of Okada and Bukry (1980) with the radiolarian Calocyletta costata zone of Motoyama and Maruyama (1998). Yanagisawa (1999a) recognized six diatom biohorizons from D35 (FO Denticulopsis praelauta; 16.4 Ma) to D43 (LO Denticulopsis okunoi; 15.4 Ma) in the Higashibessho Formation.
Lithology and environment
Primary lithology: "siliciclastic"
Environment:deep-water indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collectors:Sotoji Imamura
Collection method comments: Repository: Tohoku University
Metadata
Database number:169305
Authorizer:C. Schweitzer, M. Clapham Enterer:L. Baltzly, M. Clapham
Modifier:M. Clapham Research group:decapod,marine invertebrate
Created:2015-05-17 11:05:24 Last modified:2025-02-22 15:12:02
Access level:the public Released:2015-05-17 11:05:24
Creative Commons license:CC0
Reference information

Primary reference:
55321.decapod R. Imaizumi. 1962. Miocene Cancer (Brachyura) of Japan. Science Reports of the Tohoku University, 2nd series, Geology. Special Volume 5:233-247 [C. Schweitzer/L. Baltzly/M. Clapham]