[ Top ] [ Japanese ]

Chayaike Volcanic Rocks (Hattori, 1979) Akabane et al., 1991

• Type locality: Lake Chayaike - Sekida pass, Iiyama city, Nagano prefecture
• Volcanic rocks
• early Pleistocene (0.8 Ma)

• Lithofacies: Augite hypersthene andesite lava, Tuff breccia, Volcanic conglomerate
• Lithofacies (Minor): Mudflow deposit, Pumice tuff

• Thickness: 100 - 200 m
• Distribution: ca. 3 x 3 km²

• Distribution: Lake Chayaike - Sekita pass, Iiyama city, Nagano pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)