Kosha Lithic Pyroclastic Flow Deposit

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Kosha Lithic Pyroclastic Flow Deposit Togashi and Akahane, 1991

Type locality: Fukazawa dam, Uki, Yamanouchi city, Shimoakai county, Nagano prefecture
Tephra
Pleistocene

Lithofacies: Pyroxene andesite lava

Thickness: 120 m or thinner
Thickness (A flow unit): Several m
Upper limit: Unconformity (Kosha Pumice Flow Deposit)
Lower limit: Unconformity (Koshashukazantai Lava)

Kosha volcano
[ Upper ]
+__+__+__+__+_
Iimoriyama Lava
~~~~~~~~~~~~~~
Kosha Pumice Flow Deposit
~~~~~~~~~~~~~~
Mitsugoyama Lava
~~~~~~~~~~~~~~
Kosha Lithic Pyroclastic Flow Deposit
~~~~~~~~~~~~~~
Koshashukazantai Lava
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Fukazawa dam, Uki, Yamanouchi city, Shimoakai county, Nagano pref.
Fossils: Leaves (Sasa sp.)

Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)