[ Top ] [ Japanese ]
Minagawa Formation (Endo, 1940) Kudo et al., 2011
Invalid synonym: Hashida Formation, Ominagawa Formation, Shiroiwa Formation
- Sedimentary facies: Marine
- Sedimentary facies: Outer continental shelf, Inner continental shelf
- Depth of water: Fair-weather wave base - storm wave base or deeper
- Lithofacies: Sandy mudstone, Muddy sandstone
- Lithofacies (Minor): Sandstone, Interbedded sandy mudstone and sandstone
- Sedimentary structures: Bioturbation, Parallel stratificaiton, Hummocky stratification, Pipe rocks
- Thickness: ca. 200 - 700 m
- Upper limit: Interfingered (Furuto Formation), Conformity (Uonuma Formation, Honai Formation), Unconformity (Myogadani Formation, Kanayama Formation, Middle III Terrace Deposit, Lower I Terrace Deposit, Lower II Terrace Deposit)
- Lower limit: Interfingered (Kakuma Formation), Conformtiy (Kawaguchi Formation, Nishitajiri Formation), Unconformity (Minamiimogawa Formation, Toyagamine Formation)
- Kamo, Niigata pref.
- [ Upper ]
- ~~~~~~~~~~~~~~
- Furuto Formation
- '''''''/,,,,,,
- Minagawa Formation
- '''''''/,,,,,,
- Kakuma Formation
- --------------
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kakuma river, Ushigakubi - Magaritani, Sanjo city, Niigata pref.; Higashiosaki, Sanjo city, Niigata pref.; Yashiroda, Akiha-ku, Niigata city, Niigata pref.; Mount Saruge - Kamijo, Kamo city, Niigata pref.; Terada, Gosen city, Niigata pref.; Hitozura, Nagaoka city, Niigata pref.
- Distribution (Shiroiwa Formation): Shiroiwa - Asahi river - Jodo river - Mount Kanagura - Higashiyama - Joganji river, Nagaoka city, Niigata pref.; Nobe river, Ojiya city, Niigata pref.; Wada river - Fukuyamashinden, Uonuma city, Niigata pref.
- Fossils: Whales (Ribs), Sharks (Teeth), Plants
- Fossils (Shellfishes): Clinocardium chikagawaense, Clinocardium fastosum, Mizuhopecten yessoensis
- Fossils (Shiroiwa Formation, Omm-Manganji Fauna): Acila insignis, Anadara amicula elongata, Antiplanes contraria, Arca boucardi, Astarte sp., Clinocardium sp., Cryptomya busoensis, Cryptonatica janthostomoides, Cyclocardia ferruginea, Indocrassatella oblongata, Limopsis cumingii, Lucinoma annulata, Macoma praetexta, Megayoldia thraciaeformis, Mercenaria sp., Mizuhopecten tokyoensis, Mizuhopecten yessoensis, Modiolus difficilis, Myadora japonica, Mya japonica, Nuculana yokoyamai, Pandora pulchella, Saccella confusa, Solen sp., Tridonta borealis, Trilia japonica, Turritella saishuensis motizukii, Turritella saishuensis saishuensis, Umbonium akitanum, Yoldia notabilis
- Fossils (Diatoms): Aulacoseira spp., Coscinodiscus marginatus, Cyclotella spp., Paralia sulcata, Stephanodiscus sp., Thalassionema spp.
- Fossils (Trace fossils): Rosselia isp., Teichichnus isp.
- Fossils (Shiroiwa Formation, Foraminifera): Ammonia beccarii, Ammonia japonica, Ammonia takanabensis, Anomalinoides glabratus, Baggina cf. totomiensis, Bolivina sp., Buccella frigida, Buccella frigida carida, Buccella nipponica, Bulimina marginata, Bulimina elongata subulata, Buliminella elegantissima, Cassidulina norcrossi, Cassidulina yabei, Cibicides aknerianus, Cibicides cf. regulgens, Cribroelphidium yabei, Cribrononion clavatum, Cribrononion subgranulosum, Discorbis sp., Elphidium advenum, Elphidium clavatum, Elphidium etigoense, Elphidium subincertum, Epistominella naraensis, Eponides cf. orientalis, Fissurina biconica, Fissurina marginata, Florilus gratelonpi, Florilus japonica, Globigerina bulloides, Globigerina foliata, Globigerina quinqueloba, Globigerinoides ruber, Globobulimina auriculata, Globocassidulina parva, Globorotalia crassaformis, Guttulina lactea, Guttulina yabei, Islandiella asanoi, Lagena spp., Lenticulina sp., Melonis nicobarense, Neogloboquadrina pachyderma, Nonion japonicum, Nonionella miocenica stella, Nonion manpukujiense, Oridorsalis umbonatus, Pseudononion japonicum, Pseudorotalia gaimardii, Pullenia salisburyi, Quinqueloculina lamarckiana, Reussella aculeata, Sigmomorphina cf. ozawai, Sigmomorphina semitecta terquemiana, Siphogenerina raphana, Uvigerina sp.
- Fossils (Shiroiwa Formation, Nannofossils): Braarudasphaera bigelowii, Calcidiscus leptoporus, Coccolithus neohelis, Coccolithus pelagicus, Crenalithus doronicoides, Gephyrocapsa caribbeanica, Helicosphaera carteri
- Tephra: Ftg, Fgg, Mfsg, Osg, Stw, Hap-2, Krzg, Mdp, Om-SK110, Srt-SK100, Gjd40, SK085, Gjd64, Gjd69, Gjd70, Komp, Omig
- Tephra (Shiroiwa Formation): Thp, Usg, NA3, NA4, NA4.2, NA6, NA6.5, NA7, NA8, NA9, NA13, NA33, NA42, OK-2, OK-5
- Shimazu et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.7, pp.247-253 DOI
- Kudo et al. (2011) Geology of the Kamo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 162p. (in Japanese with English abstract 4p.)
- Ikeda and Yamaji (2008) Jour. Geol. Soc. Japan, vol.114, no.8, pp.405-414 DOI
- Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)
- Kobayashi et al. (1991) Geology of the Nagaoka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 132p. (in Japanese with English abstract 6p.)
- Yanagisawa et al. (1986) Geology of the Ojiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 177p. (in Japanese with English abstract 6p.)