Odakegawa Lavas

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Odakegawa Lavas Kawachi, 1974

Abbr.: OD

Type locality: 1,440 m above sea level of Irido river, Sakuho city, Minamisaku county, Nagano prefecture
Volcanic rocks
early Pleistocene

Lithofacies: Clinopyroxene olivine basalt
Lithofacies: Lavas (more than 3 flow units), Pyroclastic rocks

Source: Mount Yabashira
Eruptive volume: 0.6 km³
Thickness (A unit): ca. 5 m
Upper limit: Yabashirazawa Lavas
Lower limit: Yagori Volcaniclastics, Iridogawa Lava

Yabashira Volcanic Rocks
[ Upper ]
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Mizunashigawa Lavas
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Oishi Lava
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Yabashirazawa Lavas
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Odakegawa Lavas
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Iridogawa Lava
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Oishigawa Pyroclastic Flow
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Yagori Volcaniclastics
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[ Lower ]

Yabashirayama volcanic body
[ Upper ]
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Yabashira Volcanic Rocks
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[ Lower ]

Yabashira volcanoes
[ Upper ]
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Kengamine volcanic body
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Byobuiwa volcanic body
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Yabashirayama volcanic body
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Ryugamine volcanic body
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Tokin-no-iwa volcanic body
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[ Lower ]

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

Distribution: 1,250 - 1,700 m above sea level, Odake river, Sakuho city, Minamisaku county, Nagano pref.

Nishiki and Takahashi (2012) Jour. Geol. Soc. Japan, vol.118, no.8, pp.499-515 DOI
Nishiki et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.5, pp.193-211 DOI
Kawachi (1974) Geology of the Tateshinayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 5p.)