Kinpachizawa Formation

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Kinpachizawa Formation Suzuki and Kuwano, 1962

Synonym: Kimpachizawa Formation

Type locality: Kinpachi creek, Shukunohe river, Kawauchi town, Mutsu city, Aomori prefecture
Coherent formation
Miocene
Correlation: Lower Sai Formation

Lithofacies: Shale, Mudstone, Basalt lava
Lithofacies (Minor): Siliceous shale, Tuff
Lithofacies (Basal): Conglomerate

Thickness: 100 - 510 m or thicker
Upper limit: Unconformity (Yunokawa Formation), Conformity (Hinokigawa Formation)
Lower limit: Unconformity (Nagahama Formation)

northern Mutsu-Kawauchi
[ Upper ]
~~~~~~~~~~~~~~
Yunomatagawa Formaiton
~~~~~~~~~~~~~~
Yunokogawa Formation
~~~~~~~~~~~~~~
Yunokawa Formation
~~~~~~~~~~~~~~
Hinokigawa Formation
--------------
Kinpachizawa Formation
~~~~~~~~~~~~~~
[ Lower ]

southern Mutsu-Kawauchi
[ Upper ]
~~~~~~~~~~~~~~
Wakinosawa Andesites
'''''''/,,,,,,
Kozawa Formation
--------------
Hinokigawa Formation
--------------
Kinpachizawa Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Shisha creek - Arakawa river - Toishi creek - Yabitsu river - Kinpachi creek, Nishimata creek - Otoko river - Bushidomari - Oarakawa river, Mutsu city, Aomori pref.
Fossils: Foraminifera (Bathysiphon sp.)

Uemura (1975) Geology of the Mutsukawauchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 7p.)