Yanagisawa Pumice Deposit

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Yanagisawa Pumice Deposit Doi et al., 1938

Abbr.: YP

Synonym: AK-g

Type locality: Yanagisawa, Shizukuishi city, Iwate county, Iwate prefecture
Tephra
Pleistocene (11,650 yBP, ¹⁴C)
Correlation: W11

Lithofacies: Interbedded pumice and scoria

Thickness: ca. 40 - 130 cm

.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
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Main strato cone stage
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[ Lower ]

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

Distribution: Yanagisawa - Arasawa, 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.)