Where: Japan (39.8° N, 140.4° E: paleocoordinates 40.3° N, 139.8° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: NN16 nannofossil zone, Tentokuji Formation, Piacenzian (3.6 - 2.6 Ma)
• 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. Refined to Piacenzian on the basis of nannofossil biostratigraphy [A. Hendy, 6/2020]. STRATIGRAPHIC POSITION: From the "middle" member of the formation, near the middle of the section.
• bed-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, fine-grained sandstone
Size class: macrofossils
Collection methods: bulk,
• COLLECTORS: Not stated in text, but presumably including K. Amano et al. REPOSITORY: Not stated in text. Possibly Joetsu University or Akita University.
Primary reference: 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]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 97079: authorized by Austin Hendy, entered by Austin Hendy on 17.07.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gastropoda | |
"Antiplanes contraria" = Antiplanes, "Rectiplanes sp." = Antiplanes
"Antiplanes contraria" = Antiplanes snail
"Rectiplanes sp." = Antiplanes snail | |
Turritella (Neohaustator) saushuensis turret shell SUBSPECIES: Turritella (Neohaustator) saushuensis motidukii
| |
Buccinum sp. Linnaeus 1758 true whelk
Colubraria sp. Schumacher 1817 true whelk | |
Ophiodermella sp. Bartsch 1944 turrid
Brachytoma sp. Swainson 1840 turrid | |
Cryptonatica janthostoma Deshayes 1839 moon snail | |
Bivalvia | |
Acila (Truncacila) insignis divaricate nutclam | |
Saccella sematensis pointed nut clam | |
Yoldia (Cnesterium) notabilis Yokoyama 1922 clam | |
Cyclocardia cf. ferruginea Clessin 1888 clam | |
Astarte hakodatensis, "Tridonta (Tridonta) borealis" = Astarte borealis
Astarte hakodatensis clam
"Tridonta (Tridonta) borealis" = Astarte borealis Chemnitz 1784 clam | |
Lucinoma acutilineata Conrad 1849 clam | |
Thracia kakumana clam | |
Ezocallista brevisiphonata venus clam
"Phacosoma tomikawensis" = Dosinia (Phacosoma) venus clam
Mercenaria chitaniana quahog | |
Clinocardium sp. Keen 1936 cockle | |
Macoma (Macoma) cf. nipponica tellin clam | |
Mytilus sp. Linnaeus 1758 mussel | |
Anadara (Anadara) amicula, "Arca (Scapharca) sp." = Scapharca
"Arca (Scapharca) sp." = Scapharca Gray 1847 clam | |
Limopsis tokaiensis clam | |
Mizuhopecten sp. Masuda 1963 scallop |