[ Top ] [ Japanese ]

Tatsunokuchi Formation Yabe and Aoki, 1923

Invalid synonym: Tatsunokuchi Group, Tatunokuti Shell Bed, Upper Yushima Formation, Yamada Formation, Tamasawa Formation, Kogota Formation

• Type locality: Tatsunokuchi valley, Aoba-ku, Sendai city, Miyagi prefecture
• Coherent formation
• Tatsunokuchi sea sediments (Tatsunokuchi transgression)
• Miocene, Messinian - Pliocene, Zanclean (5.3 - 4.4 Ma, Diatoms)
• Correlation: Odaira Formation

• Sedimentary facies: Marine, Brackish
• Sedimentary facies: Open bay (Diatoms)
• Sedimentary facies: Temperate coniferous forests, Deciduous broad-leaved forests
• Depth of water: Shallower than 50 m
• Lithofacies: Siltstone, Sandstone, Tuffaceous mudstone
• Lithofacies (Minor): Diatomaceous mudstone, Tuff
• Lithofacies (Basal, Minor): Conglomerate
• Sedimentary structures: Bioturbation, Pipe rocks

• Thickness (Furukawa, Miyagi pref.): 120 m or thicker
• Thickness (Sendai, Miyagi pref.): 10 - 60 m
• Thickness (Iwanuma, Miyagi pref.): 15 - 30 m
• Thickness (Somanakamura, Fukushima pref.): ca. 20 m or thinner
• Upper limit: Conformity (Kazawa Formation), Unconformity (Onoda Formation, Umegasawa Tuff, Sanbongi Formation, Onuki Formation, Miyatoko Tuff Member, Mukaiyama Formation, Omotezawa Formation, Kasagami Formation, Tomegaya Formation, Dainohara Terrace Deposit)
• Lower limit: Boundary between lignite-bearing siltstone and sandstone overlying conformably
• Lower limit: Interfingered transitional (Kameoka Formation), Unconformity (Genbi Formation, Onomatsuzawa Formation, Ishikoshi Andesite, Nonodake Pyroclastic Member, Kakeyama Conglomerate Member, Shiogama Formation, Otsuka Formation, Tomizawa Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Tatsunokuchi valley - Kamiaishi, Aoba-ku, Sendai city, Miyagi pref.; Waga river, Kitakami city, Iwate pref.; Sugiyama, Hanaizumi town, Ichinoseki city, Iwate pref.; Sakurada - Takamatsu - Shidogafuchi, Kurikoma, Kurihara city, Miyagi pref.; Ashinokuchi - Kusakizawa, Hanayama, Kurihara city, Miyagi pref.; Shukugawara, Uguisuzawa, Kurihara city, Miyagi pref.; Nagane, Nakada town, Tome city, Miyagi pref.; Oshizu - Zaigo, Towa town, Tome city, Miyagi pref.; Minamimachi - Kayakari - Iga, Sanbongi, Osaki city, Miyagi pref.; Komaba - Okuda, Ohira city, Kurokawa county, Miyagi pref.; Nishitanaka - Daimanji - Yakegawara, Izumi ward, Sendai city, Miyagi pref.; Omika - Haramachi, Minamisoma city,, Fukushima pref.; Hirobuchi, Ishinomaki city, Miyagi pref.; Kagitori, Taihaku ward, Sendai city, Miyagi pref.; Takasaki - Higashitanaka, Tagajo city, Miyagi pref.; Tobigasaki, Shichigahama city, Miyagi county, Miyagi pref.; Iboishi, Shiogama city, Miyagi pref.; Kitahase, Iwanuma city, Miyagi pref.; Azukishima - Kasashima, Natori city, Miyagi pref.; Yakkiri - Higashifujiki, Soma city, Fukushima pref.; Daihata, Kashima ward, Minamisoma city, Fukushima pref.; Minesaki - Kitasekinouchi - Nakai - Yamadorisaku, Haramachi ward, Minamisoma city, Fukushima pref.
• Fossils: Whales (Vertebra, Rib), Elephants (Sinomastodon sendaicus = Trilophodon sendaicus, Molars), Delphinus sp., Horses (Hipparion sendaicus, Molars), Fishes (Bones), Sharks, Ray (Dasyatis sp., Myliobatis sp.), Crabs (Shells), Foraminifera, Ostracods, Diatoms
• Fossils (Acila insignis, Anadara amicula, Anadara subcrenata, Anadara tatunokutiensis, Arca boucardii, Bittium sp., Boreoezotrophon aff. elegantula, Callista sp., Callithaca adamsi, Caryocorbula (Anisocorbula) venusta, Cerastoderma, Clinocardium bulowi, Clinocardium californiense, Clinocardium cfr. gorokuensis, Clinocardium pseudofostosum, Cardium gorokuense, Cerithium sp., Chlamys aff. cosibensis, Ciliatocardium cf. nomurai, Clinocardium cf. buellowi, Clinocardium cf. hataii, Clinocardium cf. nomurai, Cocculina sp., Cryptomya bussoensis, Cyclina sinensis, Cyclocardia cf. ferruginea, Dentalium sp., Dosinia japonica, Dosinia (Phacosoma) tatunokutiensis, Ezocallista brevisiphonata, Felaniella usta, ƒ^ƒJƒnƒVƒzƒ^ƒe (Fortipecten takahashii), Fulvia muticum, Joannisiella cumingi, Littorina (Ezolittorina) squalid, Lucinoma acutilineatum, Lucinoma annulata, Macoma cf. aomoriensis, Macoma calcarea, Macoma incongrua, Macoma optiva, Macoma praetexta, Macoma secta, Macoma tokyoensis, Meretrix cf. parameretrix, Mitrella sp., Mizuhopecten cf. yessoensis, Modiolus sp., Mya arenaria, Mya cuneiformis, Mya japonica, Mytilus sp., Nuculana sp., Ostrea sp., Panope japonica, Pitar sendaica, Pitar sendaica monstrosa, Portlandia (Megayoldia) thraciaeformis, Pseudoamiantis sendaica, Puncturella nobilis, Sanguinolaria olivacea, Sanguinolaria spadicea, Scapharca sp., Serripes groenlandicus, Taras cumingi, Tellina sendaica, Thracia sp., Turboniella sp., Turricula sp., Yoldia (Kalayoldia) macroshima, Yoldia cf. similis
• Fossils (Diatoms): Actinocyclus cfr. curvatulus, Actinocyclus ehrenbergi, Actinocyclus ingens, Actinocyclus octonarius, Actinocyclus ohtensis, Actinoptychus senarius, Actinoptychus splendens, Actinoptychus undulatus, Anaulus sp., Arachnodiscus sp., Aulacosira granualta, Auliscus caelatus, Bacillaria paradoxa, Biddulphia aurita, Biddulphia calamus, Cocconeis antiqua, Cocconeis californica, Cocconeis costata, Cocconeis scutellum, Cocconeis vitrea, Coscinodiscus asteromphalum, Coscinodiscus cf. curvatulus, Coscinodiscus marginatus, Coscinodiscus nodulifer, Coscinodiscus stellaris, Coscinodiscus temperi, Cussia tatsunokuchiensis, Cyclotella comta, Cyclotella kützingiana, Cyclotella comta, Cyclotella meneghiniana, Cyclotella striata, Cymbella sp., Delphineis cfr. angustata, Delphineis surirella, Denticula kamtschatica, Denticula seminae, Denticulopsis kamtschatica, Diatoma sp., Diploneis smithii, Eunotia sp., Grammatophora sp., Gromphonema sp., Hantzschia amphyoxis, Hyalodiscus absoletus, Mediaria splendida, Melosira sol, Melosira sulcata, Navicula sp., Neodelphineis? sp., Nitzschia extincta, Nitzschia fossilis, Nitzschia marina, Nitzschia punctata, Paralia sulcata, Pinilaria sp., Pinnularia sp., Plagiogramma staurophorum, Plagiogramma tesseiata, Podosira stellingera, Pseudopodosira elegance, Pseudopodosira aff. orientalis, Rhaphoneis amphiceros, Rhaphoneis angustata, Rhaphoneis margaritalimbarat, Rhaphoneis surirella, Rhizosolenia styliformis, Rhopalodia sp., Rossiella tatsunokuchiensis, Stephanopyxis spp., Synedra sp., Thalassionema nitzschioides, Thalassiosira antiqua, Thalassiosira decipiens, Thalassiosira eccentricus, Thalassiosira cfr. hyalina, Thalassiosira jacksonii, Thalassiosira kryophila, Thalassiosira lineata, Thalassiosira manifesta, Thalassiosira marujamica, Thalassiosira nidulus, Thalassiosira pacifica, Thalassiothrix longissima, Trachyneis aspera, Triceratium sp., Trochosira spinosa

• Miyamoto et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.27-46 DOI
• Fujiwara et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.96-119 DOI
• Ando et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.49-67 DOI
• Tsuchiya et al. (1997) Geology of the Iwagasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 96p. (in Japanese with English abstract 4p.)
• Takeuchi and Kaneko (1996) Geology of the Shizugawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
• Yanagisawa et al. (1996) Geology of the Somanakamura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 9p.)
• Kubo et al. (1990) Geology of the Haramachi and Omika District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 138p. (in Japanese with English abstract 7p.)
• Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)
• Kitamura et al. (1983) Geology of the Yoshioka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 50p. (in Japanese with English abstract 5p.)
• Ishii et al. (1983) Geology of the Shiogama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 6p.)
• Ishii et al. (1982) Geology of the Matsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 9p.)
• Kitamura et al. (1981) Geology of the Furukawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 4p.)
• Oide and Fujita (1975) Geology of the Iwanuma District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 27p. (in Japanese with English abstract 4p.)
• Takahashi and Matsuno (1969) Geology of the Wakuya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 26p. (in Japanese with English abstract 6p.)
• Matsuno (1967) Geology of the Wakayanagi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 24p. (in Japanese with English abstract 5p.)