Jo Group

Coherent formation
Pliocene - Pleistocene

Sedimentary facies: Marine
Sedimentary facies: Small bay deposit
Lithofacies: Tuffaceous sandstone, Conglomerate

Upper limit: Unconformity (Shimotaga volcano)

Jo Group
[ Upper ]
--------------
Shimoomi Basalt
--------------
Asahidaki Basalt
~~~~~~~~~~~~~~
Ono Formation
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Jo Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Shizuoka pref.
Fossils: Shellfishes

Sawamura (1955) Shuzenji, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 47p. (in Japanese with English abstract 4p.)