Sakaguchi Tuffaceous Sandstone Member

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Sakaguchi Tuffaceous Sandstone Member Eto, 1986

Type locality: Kinugasayama park, Kinugasa town, Yokosuka city, Kanagawa prefecture
Accretionary complex
Miocene

Sedimentary facies: Marine
Lithofacies (Upper): Dacite tuff, Tuffaceous sandstone, Pumice tuff, Scoria tuff
Lithofacies (Upper, Minor): Basaltic sandstone, Mudstone
Lithofacies (Middle): Tuffaceous sandstone
Lithofacies (Middle, Minor): Mudstone
Lithofacies (Lower): Tuffaceous sandstone
Lithofacies (Lower, Minor): Lapilli tuff, Pumice tuff

Thickness: 400 - 600 m
Upper limit: Transitional (Koyabe Tuffaceous Sandstone and Mudstone Member)
Lower limit: Fault (Kinugasa Formation)

Yabe Formation
[ Upper ]
--------------
Koyabe Tuffaceous Sandstone and Mudstone Member
--------------
Sakaguchi Tuffaceous Sandstone Member
::::::::::::::
[ Lower ]

Hayama Group
[ Upper ]
~~~~~~~~~~~~~~
Yabe Formation
::::::::::::::
Kinugasa Formation
/--/--/--/--/-
Oyama Formation
--------------
Abuzuru Formation
--------------
Morito Formation
?--?--?--?--?-
[ Lower ]

Mineoka Belt (Miura peninsula)
[ Upper ]
~~~~~~~~~~~~~~
Miura Group
~~~~~~~~~~~~~~
Hayama Group
?--?--?--?--?-
[ Lower ]

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

Distribution: Kinugasayama park - Kinugawa tunnel, Kinugasa town, Yokosuka city, Kanagawa pref.; Surugazaka, Hirasaku, Yokosuka city, Kanagawa pref.; Kumura, Yokosuka city, Kanagawa pref.

Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)