Earlier stage

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Earlier stage

Type locality: Mount Moriyoshi, Kitaakita city, Akita prefecture
Volcanic rocks
Eruptive products in pre-caldera and caldera-forming stages
Pleistocene (1.05 - 0.94 Ma, K-Ar)

Lithofacies: Clinopyroxene orthopyroxene andesite block-and-ash flow deposit, Lava flow

Eruptive volume: 17 km³

Earlier stage
[ Upper ]
~~~~~~~~~~~~~~
E-3 stage
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E-2 stage
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E-1 stage
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[ Lower ]

Moriyoshi volcano
[ Upper ]
+__+__+__+__+_
Later stage
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Earlier stage
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mount Moriyoshi, Kitaakita city, Akita pref.

Kano et al. (2012) Geology of the Aniai District, 2nd Edition, 1:50,000 Quadrangle Series, Geological Survey of Japan, AIST, 59p. (in Japanese with English abstract 4p.)