Yataki Ash Flow Deposits

Yataki Ash Flow Deposits (Tsunozu Research Group, 1972) Kano et al., 2001

Invalid synonym: Yataki Pumice Tuff

Type locality: Yataki, Sojiki town, Oda city, Shimane prefecture
Tephra
Pleistocene

Sedimentary facies: Terrestrial, Shallow freshwater
Sedimentary facies (Bottom): Ground surge deposit
Lithofacies: Volcanic ash (A flow unit)
Sedimentary structures: Parallel stratification, Graded bedding

Host: Shimanohoshi Formation
Thickness: ca. 0 - 10 m
Upper limit: Unconformity (Mikusu Block-and-Ash Flow Deposits)
Lower limit: Unconformity (Tsunozu Formation, Kanmurigawa Lava, Kawakami Block-and-Ash Flow Deposits)

Oe-Takayama Volcanic Products
[ Upper ]
~~~~~~~~~~~~~~
Oe-Takayama Lava
--------------
Senyama Volcanic Products
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Mikusu Block-and-Ash Flow Deposits
--------------
Yataki Ash Flow Deposits
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Kawakami Block-and-Ash Flow Deposits
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Kakida Ash Flow Deposits
--------------
Oe Ash Flow Deposits
--------------
Kanmurigawa Lava
--------------
Kojidani Volcanic Products
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Yataki - Kawakami - Mikusu - Tonomura, Oda city, Shimane pref.; Shimanohoshi town, Gotsu city, Shimane pref.

Kano et al. (2001) Geology of the Yunotsu and Gotsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 129p. (in Japanese with English abstract 5p.)