Kajiyashiki Formation

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Kajiyashiki Formation Fujimoto et al., 1951

Invalid synonym: Onibushi Formation

Type locality: Kajiyashiki, Itoigawa city, Niigata prefecture
Volcanic rocks
early Pleistocene (1.03 Ma, FT)
Contemporaneous heterotopic facies: Takamine Formation

Sedimentary facies: Debris flow deposit
Lithofacies: Andesite tuffaceous sandstone, Volcanic blocks
Lithofacies (Minor): Mudstone, Tuff, Conglomerate
Sedimentary structures: Parallel stratification, Ripple marks
Paleocurrent: South to North

Thickness: 0 - ca. 400 m
Upper limit: Unconformity, partly Interfingered (Takanomine Formation)
Lower limit: Unconformity (Nadachi Formation, Nechi Formation)

Kajiyashiki Formation
[ Upper ]
~~~~~~~~~~~~~~
(Invalid name) Hayakawa Conglomerate Member
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(Invalid name) Yamatogawa Sandstone Member
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(Invalid name) Mawaki Conglomerate Member
~~~~~~~~~~~~~~
[ Lower ]

Itoigawa, Niigata pref.
[ Upper ]
~~~~~~~~~~~~~~
Takanomine Formation
~~~~~~~~~~~~~~
Kajiyashiki Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Kajiyashiki - Mount Takamine, Itoigawa city, Niigata pref.
Fossils: Trace fossils
Tephra: Otanigawa Tuff, Furukawa Tuff

Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)