[ Top ] [ Japanese ]

Shimosueyoshi Formation (Otsuka, 1930) Oka et al., 1984

Invalid synonym: Shimosueyoshi Terrace Deposit, Kissawa Formation, Koza Hills Formation, Amaterahara Gold Course Formation, Kuratsubo Formation, Hikibashi Sand Bed

• Type locality: Nippa town - Tsurumigawa river, Kohoku ward, Yokohama city, Kanagawa prefecture
• Type locality (Old): Shimosueyoshi, Tsurumi-ward, Yokohama city, Kanagawa prefecture
• Coherent formation
• Sediments by Shimosueyoshi transgression
• late Pleistocene, Last glacial period
• Correlation: Katanishi Formation, 3rd Terrace Deposit (Kakuda), Middle I Terrace Deposit (Somanakamura), Middle I Terrace Deposit (Haramachi), Middle I Terrace Deposit (Naraha), Middle I Terrace Deposit (Nagaoka), Ainokaze Formation, Kubo Sand, Shori Terrace Deposit, Middle Terrace Deposit (Chichibu), Musashino Terrace Deposit, Kusanagi Mud Bed, Oshika Gravel BedOchii Gravel Bed?

• Sedimentary facies: Marine, Brackish, Terrestrial, Lacustrine
• Sedimentary facies: River terrace, Valley-fill deposit, Delta, Alluvial fan
• Sedimentary facies (Basal): Lag, Inner bay
• Lithofacies: Gravels, Sands, Mud
• Lithofacies (Minor): Peat
• Lithofacies (Basal): Gravels, Sands, Mud
• Sedimentary structures: Cross stratification

• Thickness: 1 - 30 m or thicker
• Thickness (Basal): 1 - 10 m
• Upper limit: Conformity (Shimosueyoshi Loam), Unconformity (Musashino Loam, Obaradai Sand and Gravel Formation, Sagamihara Terrace Deposit, Zenghyo Formation)
• Lower limit: Unconformity (Totsuka Formation, Terao Formation, Tsurumi Formation, Ozenji Formation, Takatsu Formation, Echi Formation, Tsuchiya Formation, Soda Formation, Sannodai Loam)

• Distribution: Nippa town - Tsurumigawa river, Kohoku ward, Yokohama city, Kanagawa pref.; Kosuzume town - Gumizawa town - Totsuka town - Yabe town - Kamiyabe town - Akiba town - Okatsu town, Totsuka ward, Yokohama city, Kanagawa pref.; Isogo town, Isogo ward, Yokohama city, Kanagawa pref.; Shimizugaoka, Minami ward, Yokohama city, Kanagawa pref.; Kuboyama, Nishi ward, Yokohama city, Kanagawa pref.; Tokiwadai, Hodogaya ward, Yokohama city, Kanagawa pref.; Kanawaga ward - Kohoku ward - Tsurumi ward, Yokohama city, Kanagawa pref.; Hikibashi, Miura city, Kanagawa pref.
• Fossils: Plant fragments
• Fossils (Basal, Shellfishes): Anadara broughtonii, Anadara granosa, Anadara subcrenata, Anomia lischkei, Atrina sp., Babylonia japonica, Batillaria multiformis, Batillaria zonalis, Callista chinensis, Cerithidea djadjariensis, Crassostrea gigas, Cryptonatica janthostomoides, Cyclina chinensis, Cyclodicama cumingi, Dentalium octangulatum hexagonum, Dinocardium braunsi, Dosinella penicillata, Dosinia angulosa, Fulvia mutica, Macoma tokyoensis, Mactra sulcataria, Meretrix meretrix lusoria, Merisca tokunagai, Mitrella dunkeri, Mizuhopecten tokyoensis, Mya arenaria oonogai, Nassarius caelatus, Nitidotellina nitidula, Panopea japonica, Paphia euglypta, Paphia undulata, Pecten albicans albicans, Proclava kochi, Pycnodonta musashiana, Rapana thomasiana, Reishia bronni, Saxidomus purpurata, Semelangulus miyatensis, Solen strictus, Tapes japonica, Theora lubrica, Tonna luteostoma, Trapezium liratum, Tresus keenae, Tritia japonica, Umbonium costatum
• Fossils (Basal): Trace fossils (Boring shells)
• Tephra (Index): NG

• Oka et al. (1984) Geology of the Tokyo-Seinambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 148p. (in Japanese with English abstract 7p.)
• Mitsunashi and Kikuchi (1982) Geology of the Yokohama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 105p. (in Japanese with English abstract 4p.)
• Kodama et al. (1980) Geology of the Misaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 38p. (in Japanese with English abstract 3p.)
• Oka et al. (1979) Geology of the Fujisawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 5p.)