Senyama Volcanic Products

[ Top ] [ Japanese ]

Senyama Volcanic Products Kano et al., 2001

Type locality: Mount Senyama, Omori town, Oda city, Shimane prefecture
Volcanic rocks
Pleistocene (1.76 Ma, K-Ar)
Interfingered: Shimanohoshi Formation
Intruded by: Oe-Takayama Lava

Sedimentary facies: Pyroclastic cone
Sedimentary facies: Block-and-Ash flow deposit
Lithofacies: Hornblende biotite dacite volcanic breccia, Lapiili tuff, Tuff
Sedimentary structures: Parallel stratification, Low-angle cross stratification
Paleocurrent: from West to East

Source: Mount Senyama
Thickness: ca. 250 m
Lower limit: Unconformity (Kanmurigawa Lava, Tsunozu Formation)

Oe-Takayama Volcanic Products
[ Upper ]
~~~~~~~~~~~~~~
Oe-Takayama Lava
--------------
Senyama Volcanic Products
--------------
Mikusu Block-and-Ash Flow Deposits
--------------
Yataki Ash Flow Deposits
--------------
Kawakami Block-and-Ash Flow Deposits
--------------
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 Senyama, Omori town, Oda city, Shimane pref.
Deposit: Omori mine

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.)