Koiwai Mudflow Deposit

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Koiwai Mudflow Deposit

Coherent formation
Caldera volcano
Pleistocene - Holocene

Lithofacies: Mud flow deposit

Iwate volcano
[ Upper ]
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Koiwai Mudflow Deposit
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Komatsukuramori Lava
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Arinesawa Lava
~~~~~~~~~~~~~~
[ Lower ]

Iwate volcanic group
[ East ]
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Iwate volcano
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Inukura volcano
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Omatsukura volcano
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Marumori volcano
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[ West ]

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

Distribution: 200 - 600 m above sea level of southern flank of Mount Iwate, Shizukuishi city, Iwate county, Iwate pref.

Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)