Origamizawa Formation

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Origamizawa Formation Muraoka and Hase, 1990

Invalid synonym: Lower Hayasemori Formation

Type locality: Origami creek, Owani city, Minamitsugaru county, Aomori prefecture
Volcanic rocks
Miocene

Sedimentary facies: Marine
Lithofacies: Dacite lava, Dacitic tuff
Lithofacies (Minor): Siltstone

Thickness: 310 m
Upper limit: Conformity (Lower Member of Itadome Formation), Unconformity (Obirakiyama Pyroclastic Flow Deposit)

Kuroishi, Aomori pref.
[ Upper ]
~~~~~~~~~~~~~~
Nuruyu Formation
--------------
Itadome Formation
--------------
Origamizawa Formation
--------------
Manzaemonyama Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Origami creek - Itsuchi - Mount Dogatai, Owani city, Minamitsugaru county, Aomori pref.; Motonagamine, Owani city, Minamitsugaru county, Aomori pref.; Mitsumenai, Owani city, Minamitsugaru county, Aomori pref.

Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)