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 "lower" member of the formation, near the base of the section.
• bed-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified sandstone and poorly lithified siltstone
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 97077: authorized by Austin Hendy, entered by Austin Hendy on 17.07.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Bivalvia | |
Musculus laevigatus mussel | |
Porterius dalli clam | |
"Arca boucardi" = Tetrarca boucardi
"Arca boucardi" = Tetrarca boucardi Jousseaume 1894 clam | |
Barbatia sp. Gray 1842 clam | |
Limopsis tajimae clam | |
Mizuhopecten sp., Mizuhopecten yokoyamae, Yabepecten tokunagai, Chlamys (Chlamys) cosibensis, Chlamys (Chlamys) tamurae, "Swiftopecten sp." = Chlamys (Swiftopecten)
Mizuhopecten sp. Masuda 1963 scallop
Mizuhopecten yokoyamae scallop
Yabepecten tokunagai scallop
Chlamys (Chlamys) cosibensis Yokoyama 1911 scallop
Chlamys (Chlamys) tamurae Masuda and Sawada 1961 scallop
"Swiftopecten sp." = Chlamys (Swiftopecten) Hertlein 1935 scallop | |
"Tridonta (Tridonta) borealis" = Astarte borealis
"Tridonta (Tridonta) borealis" = Astarte borealis Chemnitz 1784 clam | |
Clinocardium (Cilatocardium) ciliatum Fabricius 1780 cockle
Nemocardium samarangae cockle | |
Macoma (Macoma) nipponica tellin clam
Macoma (Macoma) calcarea Gmelin 1792 tellin clam
"Cadella lubrica" = Tellina (Cadella) tellin clam | |
"Felaniella usta" = Diplodonta, Cycladicama cumingii
"Felaniella usta" = Diplodonta clam
Cycladicama cumingii clam | |
"Phacosoma tomikawensis" = Dosinia (Phacosoma), Mercenaria cf. stimpsoni, Mercenaria chitaniana, Pseudamiantis cf. tauyensis
"Phacosoma tomikawensis" = Dosinia (Phacosoma) venus clam
Mercenaria cf. stimpsoni quahog
Mercenaria chitaniana quahog
Pseudamiantis cf. tauyensis venus clam | |
"Spisula (Mactromeris) grayana" = Mactromeris, "Spisula (Mactromeris) voyi" = Mactromeris polynyma
"Spisula (Mactromeris) grayana" = Mactromeris clam
"Spisula (Mactromeris) voyi" = Mactromeris polynyma Stimpson 1860 clam | |
"Portlandia (Portlandella) japonica" = Megayoldia (Portlandella)
"Portlandia (Portlandella) japonica" = Megayoldia (Portlandella) clam | |
Malletia inermis clam | |
Yoldia sp. Möller 1842 clam | |
Acila sp., Acila (Truncacila) insignis, Acila (Truncacila) aff. castrensis, Acila (Acila) divaricata, Ennucula cf. nipponica
Acila sp. Adams and Adams 1858 divaricate nutclam
Acila (Truncacila) insignis divaricate nutclam
Acila (Truncacila) aff. castrensis Hinds 1843 divaricate nutclam
Acila (Acila) divaricata Hinds 1843 divaricate nutclam
Ennucula cf. nipponica nut clam | |
Gastropoda | |
Turcica sp. Adams 1854 snail | |
Puncturella (Puncturella) nobilis puncturella | |
Umbonium sp. Link 1807 top snail | |
Minolia sp. Adams 1860 snail | |
Lepeta cf. lima limpet | |
Turritella (Neohaustator) saushuensis turret shell | |
Littorina sp. Ferussac 1821 periwinkle | |
Cryptonatica janthostomoides moon snail
Glossaulax cf. vesicalis Philippi 1848 moon snail | |
Erronea sp. Troschel 1863 cowry | |
Buccinidae indet. Rafinesque 1815 true whelk
Buccinum sp. Linnaeus 1758 true whelk
Colubraria sp. Schumacher 1817 true whelk
Neptunea (Neptunea) eos true whelk | |
Lirabuccinum sp. Vermej 1991 snail | |
"Oliva mustelina" = Oliva (Neocylindrus) mustelina
"Oliva mustelina" = Oliva (Neocylindrus) mustelina Lamarck 1810 olive snail | |
Conidae indet. Fleming 1822 cone shell | |
Fulgoraria prevostiana volute | |
Fusitriton izumozakiensis triton shell |