Takaoka Sand and Silt Member

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Takaoka Sand and Silt Member Toyono Collaborative Research Group, 1977

Type locality: Hara, Nakano city, Nagano prefecture
Coherent formation
Middle Pleistocene

Sedimentary facies: Lacustrine
Lithofacies: Sands, Silt
Lithofacies (Minor): Gravels, Volcanic ash, Pumice

Thickness: 40 - 50 m
Upper limit: Conformity (Kannonyama Silt Member)
Lower limit: Unconformity (Minochi Formation, Yashiki Formation)

Toyono Formation
[ Upper ]
~~~~~~~~~~~~~~
Hiraide Sand and Gravel Member
--------------
Kannonyama Silt Member
--------------
Takaoka Sand and Silt Member
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Hara, Nakano city, Nagano pref.

Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)