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Nishikarasugawa Andesite NEDO, 1990

Invalid synonym: Nishikarasugawa Formation, Nishikarasugawa Lava, Higashikarasugawa Lava

• Volcanic rocks
• early Pleistocene (1.51 Ma, K-Ar)

• Lithofacies: Andesite lava
• Lithofacies (Minor): Sandstone, Mudstone

• Source: South - Southwest
• Thickness: ca. 400 m
• Thickness (A flow unit): several - 10 m or thicker
• Upper limit: Unconformity (Sogodai Lava, Minowasan Lava, Kimenzan Lava)
• Lower limit: Unconformity (Yokomuki Formation)

• Distribution: Nishikarasugawa - Tuchiyu pass, Tsuchiyuonsen town, Fukushima city, Fukushima pref.; Mount Kuromori, Ozaso, Fukushima city, Fukushima pref.

• Sakaguchi (1995) Geology of the Nihonmatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 4p.)