Osawa Granite Porphyry

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Osawa Granite Porphyry Harayama et al., 2000

Type locality: Osawa, Omachi city, Nagano prefecture
Intrusive rocks
early Pleistocene
Intruded in: Jiigatake Volcanics

Sedimentary facies: Arc-shaped dike
Lithofacies: Granite porphyry

Jiigatake Caldera
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Osawa Granite Porphyry
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Kurobegawa Granite
~~~~~~~~~~~~~~
Jiigatake Volcanics
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Jiigatake-Shirasawatengu Caldera Complex
~~~~~~~~~~~~~~
Omine Pyroclastic Flow Deposit
~~~~~~~~~~~~~~
Jiigatake Caldera
~~~~~~~~~~~~~~
Shirasawatengu Caldera
~~~~~~~~~~~~~~

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Osawa - Harinoki snow valley - Akaishizawa creek, Omachi city, Nagano pref.

Harayama et al. (2000) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 218p. (in Japanese with English abstract 6p.)