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Toyoda Formation Sakamoto, 1955
- Type locality: Mount Toyodayama, Toyoda town, Tenri city, Nara prefecture
- Coherent formation
- Miocene
- Sedimentary facies: Marine
- Sedimentary facies: Open sea
- Water temperature: Cold ocean current
- Water temperature (Lower, Minor): Warm ocean current
- Depth of water: ca. 200 m or deeper
- Depth of water (Lower, Minor): 50 m or shallower
- Lithofacies: Sandstone, Siltstone
- Sedimentary structures: Parallel stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Rokuyaon town - Fujiwara town - Kubonosho town - Kokuzo town, Nara city, Nara pref.; Toyoda town, Tenri city, Nara pref.
- Fossils: Fish scales (Cluppeidae), Sharks (Scoliodon krassi), Crabs (Carcinoplax antiqua), Shrimp, Echinoids (Linthia nipponica), Corals, Foraminifera, Diatoms
- Fossils (Shellfishes): Acila divaricata, Acila exima, Acteon nipponensis, Anadara sp., Ancistrolepis sp., Calyptraea mamilaris, Cardium ogurai, Chlamys kokawai, Crassatellites makiyamai, Crassatellites nanus, Cuspidaria sp., Cyclocardia ferruginea, Cyclocardia ferruginea orbicularis, Cyclocardia siogamensis, Cyclocardia tokunagai, Cylichna sp., Dentalium septentrionalis, Dentalium yokoyamai, Dosinia sp., Fulgolaria sp., Lucinoma annulata, Macoma optiva, Nassarius simizui, Natica sp., Neptunea sp., Nuculana pennula, Ostrea mikasa, Patinopecten aff. yessoensis, Pecten sp., Phaxas izumoensis, Pinna sp., Protorotella ishizumensis, Protorotella yuantaniensis, Pupa sp., Ringicula sp., Saccella kongiensis, Septifer sp., Siphonaria sp., Solamen sp., Solen sp., Tellina sp., Turbo sp., Turritella sp., Volsella sp., Yoldia sagitaria, Yolda tokunagai
- Fossils (Foraminifera): Globigerina falconensis, Globigerina praebulloides praebulloides, Globigerina woodi, Globigerinita glutinata, Globigerinoides quadrilobatus immaturus, Globigerinoides quadrilobatus sacculifer, Globigerinoides quadrilobatus trilobus, Globigerinoides sicanus, Globoquadrina altispira altispira, Globorotalia mayeri, Globorotalia peripheroronda, Globorotalia semivera, Praeorbulina transitaria, Prosphaeroidinella disjuncta
- Fossils (Pollen): Abies sp., Carpinus-Ostrya, Fagus sp., Juglans sp., Liquidambar sp., Picea sp., Pinus sp., Pteridophyta, Tsuga sp.
- Fossils (Trace fossils): Cylindrichnus isp., Skolithos isp.
- Sato et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.53-69 DOI
- Nishioka et al. (2001) Geology of the Sakurai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 141p. (in Japanese with English abstract 5p.)