[ Top ] [ Japanese ]

Tsukinoki Formation (Kato, 1949) Kitamura et al., 1986

• Type locality: Tsukinoki, Shibata city, Shibata county, Miyagi prefecture
• Coherent formation
• early Miocene (Fossils)
• Contemporaneous heterotopic facies: Lower Member of Kaneyama Formation

• Sedimentary facies: Shallow marine, Terrestrial
• Sedimentary facies: Inner bay
• Climate: Warm (Plant fossils)
• Lithofacies (Upper): Interbedded sandstone and siltstone
• Lithofacies (Upper, Minor): Conglomerate
• Lithofacies (Middle): Rhyolitic pumice tuff, Tuff, Lapilli tuff
• Lithofacies (Lower): Sandstone, Siltstone, Conglomerate, Tuff
• Lithofacies (Lower, Minor): Lignite

• Thickness: 20 - 230 m
• Thickness (Upper): 20 - 60 m
• Thickness (Middle): ca. 30 m
• Thickness (Lower): 150 m or thinner
• Upper limit: Interfingered (Takadate Formation)
• Lower limit: Abut unconformity (Wariyama Metamorphic Rocks, Granites)

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

• Distribution: Tsukinoki, Shibata city, Shibata county, Miyagi pref.; Sugo, Murata city, Shibata county, Miyagi pref.; Tarumizu dam, Natori city, Miyagi pref.
• Fossils: Mammalia (Eostegodon pseudolatidens, Stegodon miyakoae)
• Fossils (Kadonosawa fauna): Anadara (Hataiarca) kakehataensis, Batillaria (Tateiwaia) sitoi, Crassosirea gravitesta, Crepidula sp., Cyclina (Cyclina) japonica, Dosinia (Phacosoma) nomurai, Hiatula minoensis, Macoma sp., Striarca uetsukiensis, Tellina sp., Vicarya sp.
• Fossils (Tsukinoki flora): Carpinus laxiflora, Cinnamomum lanceolatum, Cinnamomum scheuchzeri, Comptonia naumanni, Dryophyllum dewalquei, Euonymus sp., Fagus sp., Ficus tiliaefolia, Ilex cornuta, Juglans sp., Laurus primigenia, Liquidambar formosana, Litsea sp., Pterocarya sp., Quercus drymeja, Quercus glauca, Quercus serrata, Salix sp., Sapium japonicum, Sorbus sp., Styrax sp., Trapa sp., Ulmus sp., Viburum sp., Zelkova ungeri

• 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
• 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.)
• 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.)