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Okuwa Debris Avalanche Deposit (Ota, 1957)

Synonym: Okuwa Mudflow Deposit, Maebashi Mudflow Deposit

• Volcanic rocks
• Late Pleistocene

• Sedimentary facies: Terrestrial
• Sedimentary facies: Mudflow hills
• Lithofacies: Andesitic lava, Andesitic volcanic breccia, Andesitic tuff breccia, Agglutinates

• Thickness: 60 m
• Upper limit: Unconformity (Tsumagoi Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Banki Lava, Agatsuma Clay)

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

• Distribution: Okuwa, Naganohara city, Agatsuma county, Gunma pref.

• Nakamura et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.397-412, DOI
• Ota (1957) Kusatsu, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 8p.)