[ Top ] [ Japanese ]

Kameoka Formation (Iwai, 1949) Hanzawa et al., 1953 (Photo)

Invalid synonym: Ariga Formation, Geba Formation, Matsuyama Formation

• Type locality: Ushigoe bridge, Hirose river, Kameoka, Sendai city, Miyagi prefecture
• Coherent formation
• early Pliocene (Paleomagnetism)

• Sedimentary facies: Marine, Fluvial
• Sedimentary facies (Upper): Estuary
• Sedimentary facies (Lower): Meandering river
• Lithofacies (Upper): Siltstone
• Lithofacies (Middle): Interbedded sandstone and siltstone
• Lithofacies (Lower): Sandstone
• Lithofacies (Basal): Conglomerate
• Lithofacies (Minor): Lignite, Dacite -rhyolite tuff
• Sedimentary structures: Cross stratification

• Thickness: 1 - 120 m
• Upper limit: Boundary between lignite-bearing siltstone and sandstone overlying conformably
• Upper limit: Interfingered transitional (Tatsunokuchi Formation), Unconformity (Umegasawa Tuff, Kasagami Formation)
• Lower limit: Unconformity (Shirasawa Formation, Nashino Formation, Tsunaki Formation, Shimokurosawa Formation, Omatsuzawa Formation, Koganehasama Formation, Nonodake Pyroclastic Member, Oido Sandstone Member, Kakeyama Conglomerate Member, Mitsuya Formation, Shiogama Formation, Nanakita Formation, Sauramachi Formation, Ajiri Formation, Otsuka Formation, Takadate FormationTomizawa Formation, Nakanosawa Formation, Tochikubo Formation), Abut unconformity (Mitaki Formation)

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

• Distribution: Nanakita hill, northern Sendai city, Miyagi pref.
• Distribution: Kameokahachiman, Kameoka, Aoba-ku, Sendai city, Miyagi pref.; Sankyo-tei, Izumi-ku, Sendai city, Miyagi pref.; Ariga, Wakayanagi, Kurihara city, Miyagi pref.; Sugiyama, Hanaizumi town, Ichinoseki city, Iwate pref.; Sakuragaoka, Aoba-ku, Sendai city, Miyagi pref.; Akida - Zanpu - Takoda - Iga, Sanbongi, Osaki city, Miyagi pref.; Wakuya, Toda county, Miyagi pref.; Okuda - Omori - Arayashiki, Ohira city, Kurokawa county, Miyagi pref.; Tsuruta river, Osato city, Kurokawa county, Miyagi pref.; Nishitanaka, Izumi ward, Sendai city, Miyagi pref.; Hirobuchi, Ishinomaki city, Miyagi pref.; Kamimaeyanagi, Higashimatsushima city, Miyagi pref.; Kagitori, Taihaku ward, Sendai city, Miyagi pref.; Minatohama - Tobigasaki, Shichigahama city, Miyagi county, Miyagi pref.; Higashifujiki - Yakkiri, Soma city, Fukushima pref.; Minesaki, Haramachi ward, Minamisoma city, Fukushima pref.
• Fossils: Balanus sp.
• Fossils (Bivalves): Crassostrea gigas, Tellinidae gen. et sp. indet, Trapezium sp., Veneridae gen. et sp. indet
• Fossils (Sendai flora): Alnus japonica, Carex sp., Carpinus japonica, Cephalotaxus sp., Eurya sp., Fagus crenata, Glyptostrobus sp., Meliosma sp., Picea sp., Sequoia japonica, Styrax sp., Trapa incisa
• Fossils (Pollen): Alnus sp., Cunninghamia sp., Fagus sp., Liquidambar sp., Nyssa sp., Picea sp., Pinus sp., Quercus sp., Sequoia sp., Taxodium sp.
• Fossils (Diatoms): Actinoptychus senarius, Aulacosira granulata, Coscinodiscus spp., Cyclotella striata, Delphineis spp., Epithemia sp., Fragilaria sp., Melosira cfr. varians, Navicula sp., Nitzschia punctata, Opephora mrtyi, Paralia sulcata, Podosira stellingera, Pseudopodosira aff. orientalis, Stephanodiscus sp., Synedra ulna, Thalassionema nitzschioides, Thalassiosira sp.

• 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
• 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.)