[ Top ] [ Japanese ]
Togawa Formation (Hayakawa, 1954) Chinzei, 1966
Invalid synonym: Kawaguchi Sandstone Formation
- Type locality (Seikoshi Alternation): Seikoshi, Shingo city, Sannohe county, Aomori prefecture
- Coherent formation
- Pliocene (3.6 - 2.6 Ma, FT)
- Contemporaneous heterotopic facies (Bottom): Toya Formation
- Sedimentary facies: Shallow marine
- Depth of water: Upper sublittoral - Middle sublittoral (0 - 60 m, Shellfish fossils)
- Lithofacies: Sands
- Lithofacies (Minor): Gravels, Silt, Pyroclastic flow deposit, Volcanic ash, Transgressive lag
- Sedimentary structures: Trough cross-stratification, Parallel stratification
- Togawa Formation
- [ Upper ]
- ~~~~~~~~~~~~~~
- Seikoshi Alternation
- '''''''/,,,,,,
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Seikoshi, Shingo city, Sannohe county, Aomori pref.; Nakawatari, Takisawa, Towada city, Aomori pref.; Mount Takamori, Towada city, Aomori pref.; Ashinasawa - Morihara - Yagami - Mukaimura, Towada city, Aomori pref.
- Fossils: Whales, Trace fossils (Rosselia isp.)
- Fossils (Omma-Manganji fauna, Tatsunokuchi fauna): Anadara ommaensis, Anadara tatunokutiensis nagawensis, Buccinum middendorffi, Callista cf. brevisiphonata, Callista sp., Callithaca cf. adamsi, Clinocardium cf. chikagawaensis, Clinocardium (Keenocardium) californiense, Clinocardium sp., Cryptonatica janthostomoides, Cyclocardia ferruginea, Dosinia cf. japonica, Dosinia (Kaneharaia) kaneharai, Dosinia (Phacosoma) japonica, Dosinorbis (Phacosoma) japonicus, Dosinorbis (Phacosoma) sp., Euspira cf. pila shimokitaensis, Felaniella usta, Fortipecten aff. takahashii, Glycymeris (Glycymeris) yessoensis, Glycymeris cf. yessoensis, Glycymeris (Glycymeris) sp., Heterocliddus pulchellus, Limopsis (Empleconia) cumingi, Lucinoma annulatum, Macoma cf. tokyoensis, Macoma sp., Mactra sulcataria carneopicta, Megangulus venulosus, Megangulus zyonoensis, Mercenaria stimpsoni, Meretrix lusoria, Mya (Arenomya) arenaria oonogai, Mya japonica, Mya japonica oonogai, Neohaustator nipponica, Neptunea (Barbitonia) arthritika, Neptunea sakurai, Oenopota cf. kagana, Ophiodermella miyatensis, Panope cf. estrellana, Patinopecten (Mizuhopecten) yessoensis, Pecten (Fortipecten) kenyoshiensis, Pecten (Patinopecten) sannohensis, Protothaca (Callithaca) adamsi, Rapana venosa, Serripes cf. groenlandica, Serripes cf. yokoyamai, Siliqua cf. alta, Solen krusensterni, Spisula (Mactoromeris) voyi, Spisula (Pseudocardium) kurikoma, Tellina (Peronidia) protovenulosa, Tridonta (Tridonta) borealis, Turritella saishuensis, Umbonium (Suchium) costatum, Venericardia (Cyclocardia) aomoriensis, Venericardia (Cyclocardia) cf. crebricostata
- Kudo (2005) Geology of the Towada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)