Oe Ash Flow Deposits

Oe Ash Flow Deposits (Tsunozu Research Group, 1983) Kano et al., 2001

Invalid synonym: Oe Pumice Tuff

Type locality: Oe, Oshiro town, Oda city, Shimane prefecture
Tephra
Pleistocene

Sedimentary facies: Very shallow brackish
Sedimentary facies: Fandelta facing sea, Lagoon
Sedimentary facies (Top): Ash-cloud surge deposit
Sedimentary facies (Bottom): Ground surge deposit
Sedimentary facies (Minor): Lahar deposit
Lithofacies: Pumice tuff (3 - 4 flow units)
Sedimentary structures: Parallel stratification, Wavy stratification, Low-angle cross stratification, Graded bedding

Host: Tsunozu Formation
Thickness: ca. 2 - 20 m
Upper limit: Unconformity (Kakida Ash Flow Deposits)
Lower limit: Conformity (Kanmurigawa Lava), Unconformity (Tsunozu Formation)

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: Mount Oe-Takayama - Oe - Ota - Yoshiura farm - Sojiki, Oda city, Shimane pref.; Komatsuji, Misato city, Ochi county, 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.)