Okura Pyroclastic Flow Deposits

[ Top ] [ Japanese ]

Okura Pyroclastic Flow Deposits Kano et al., 2025

Type locality: Okuragawa river, Hoki city, Saihaku county, Tottori prefecture
Volcanic rocks
Pleistocene

Lithofacies: Pyroclastic flow deposits
Lithofacies: Pumiceous lapilli-bearing lapilli tuff

Thickness: 6 m or thicker

Older Volcanic Fan Deposits
[ Upper ]
~~~~~~~~~~~~~~
Fukuichi Sand and Gravel Bed
~~~~~~~~~~~~~~
Upper part
~~~~~~~~~~~~~~
Okura Pyroclastic Flow Deposits
~~~~~~~~~~~~~~
Lower part
~~~~~~~~~~~~~~
[ Lower ]

Older volcano
[ Upper ]
~~~~~~~~~~~~~~
Lower Tephra Group
~~~~~~~~~~~~~~
Older Volcanic Fan Deposits
~~~~~~~~~~~~~~
[ Lower ]

Daisen volcano
[ Upper ]
+__+__+__+__+_
Younger volcano
~~~~~~~~~~~~~~
Older volcano
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Okuragawa river - Besshogawa river, Hoki city, Saihaku county, Tottori pref.

Kano et al. (2025) Geology of the Yonago District (2nd Ed.), Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 84p. (in Japanese with English abstract 4p.)