Augite
Mount Hijiri
Oka-Otsu, Nagano city, Nagano pref., Japan
Field of view: 20 mm. Dispatched augite phenocrysts of andesite.
Recovered from weathered part of Tararayama Andesite of Hijiriyama Volcanics erupted from a submarine volcano. Formed in the late Miocene (5.4 Ma).
Augite from this location was described in 1917.
Other localities
- Mount Hijiri (Andesite, Floater)
- Akima river (Andesite, Floater)
- Yaga (Andesite dike)
- Shishi-Iwa (Tuff breccia, Floater)
- Horaku creek (Basalt, Floater)