Loc. 2.1, Sannai River [Tentokuji Fm]: Pliocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Turritellidae
10 specimens
Bivalvia - Protobranchia - Nuculanidae
90 specimens
Bivalvia - Protobranchia - Sareptidae
7 specimens
Bivalvia - Protobranchia - Yoldiidae
3 specimens
Bivalvia - Protobranchia - Malletiidae
5 specimens
Bivalvia - Protobranchia - Nuculidae
33 specimens
Bivalvia - Carditida - Astartidae
1 specimen
Bivalvia - Carditida - Carditidae
8 specimens
Bivalvia - Pandorida - Pandoridae
Pandora wardiana Adams 1860
1 specimen
Bivalvia - Lucinida - Thyasiridae
1 specimen
Bivalvia - Cardiida - Tellinidae
2 specimens
Bivalvia - Cardiida - Cardiidae
10 specimens
Bivalvia - Venerida - Ungulinidae
1 specimen
1 specimen
Bivalvia - Venerida - Veneridae
4 specimens
Bivalvia - Arcida - Noetiidae
1 specimen
Bivalvia - Arcida - Arcidae
5 specimens
Bivalvia - Arcida - Glycymerididae
3 specimens
Bivalvia - Arcida - Parallelodontidae
2 specimens
Bivalvia - Pectinida - Pectinidae
2 specimens
Mizuhopecten sp. Masuda 1963
1 specimen
Gastropoda - Neogastropoda - Buccinidae
4 specimens
see common names

Geography
Country:Japan
Coordinates: 39.8° North, 140.4° East (view map)
Paleocoordinates:39.6° North, 139.5° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Pliocene
10 m.y. bin: Cenozoic 6
Key time interval: Pliocene Nannofossil zone:  NN16
Age range of interval: 5.333 - 2.58 m.y. ago
Stratigraphy
Formation:Tentokuji
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Akita Fm, which overlie the Funakawa Fm, and is overlain by the Sasaoka Fm. AGE: Middle Pliocene, on the basis of foraminiferal and calcareous nanofossil biostratigraphy. STRATIGRAPHIC POSITION: From the "lower" member of the formation, near the base of the section.
Lithology and environment
Primary lithology: poorly lithified sandstone
Secondary lithology: poorly lithified siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Alternating of siltstone and sandstone. LITHIFICATION: Poorly-lithified, based on figured specimens.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Both cold- and warm-water species found. Shallow warm-water currents over the cold-water mass is suggested.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTORS: Not stated in text, but presumably including K. Amano et al. REPOSITORY: Not stated in text. Possibly Joetsu University or Akita University.
Taxonomic list comments:COVERAGE: Exhaustive of mollusca. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications.
Metadata
Database number:97076
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2010-07-17 15:58:37 Last modified:2025-02-22 15:12:02
Access level:the public Released:2010-07-17 15:58:37
Creative Commons license:CC0
Reference information

Primary reference:
33142. K. Amano, M. Suzuki, and T. Sato. 2000. Warm-water influx into Japan Sea in the middle Pliocene - Molluscan faunas from the Tentokuji FOrmation around Mt. Taihei in Akita Prefecture. Journal of the Geological Society of Japan 106(4):299-306 [A. Hendy/A. Hendy]