K2P Tephra

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K2P Tephra

Abbr.: K2P

Type locality: Koiwai, Morioka city, Iwate prefecture
Tephra
Pleistocene - Holocene

Lithofacies: Interbedded pumice and scoria

Source: Akita-Komagatake volcano

Koiwai Pumice Deposit
[ Upper ]
~~~~~~~~~~~~~~
K1P
~~~~~~~~~~~~~~
K2P
~~~~~~~~~~~~~~
K3P
~~~~~~~~~~~~~~
[ Lower ]

.Syn-caldera formation stage
[ Upper ]
~~~~~~~~~~~~~~
Yanagisawa Pumice Deposit
~~~~~~~~~~~~~~
Obonai Pyroclastic Flow Deposit
~~~~~~~~~~~~~~
Koiwai Pumice Deposit
~~~~~~~~~~~~~~
[ Lower ]

Akita-Komagatake volcano
[ Upper ]
~~~~~~~~~~~~~~
Post-caldera eruption stage
~~~~~~~~~~~~~~
Syn-caldera formation stage
~~~~~~~~~~~~~~
Main strato cone stage
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Koiwai, Morioka city, Iwate pref.; Wakare, Sugo, Takizawa city, 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.)