Matsuba Tuffaceous Siltstone Member

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Matsuba Tuffaceous Siltstone Member

Type locality: Kurama, Kakegawa city, Shizuoka prefecture
Coherent formation
middle Miocene

Lithofacies (Top): Interbedded tuffaceous siltstone and mudstone
Lithofacies (Upper): Tuffaceous mudstone
Lithofacies (Middle): Interbedded tuffaceous siltstone and mudstone
Lithofacies (Lower): Tuffaceous siltstone
Lithofacies (Bottom): Sandstone

Thickness: ca. 800 m
Upper limit: Transitional (Masago Mudstone Member)

Matsuba Formation
[ Upper ]
~~~~~~~~~~~~~~
Masago Mudstone Member
--------------
Matsuba Tuffaceous Siltstone Member
~~~~~~~~~~~~~~
[ Lower ]

Kurami Group
[ Upper ]
~~~~~~~~~~~~~~
Matsuba Formation
--------------
Amenomiya Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Kurama, Kakegawa city, Shizuoka pref.
Fossils (Shellfishes): Portlandia sp., Thracia sp.

Makiyama and Sakamoto (1957) Mitsuke & Kakezuka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)