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P1 Pumice Flow Deposit

Abbr.: P1

• Tephra
• Pleistocene

• Lithofacies: Dacite pumice flow deposit
• Lithofacies (Minor): Charcoal

• Source: Asama volcano
• Thickness: 30 m
• Distribution: 223 km²
• Volume: 3.3 km³

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

• Distribution: Namezu river, Nakagomi, Saku city, Nagano pref.

• Kawachi and Aramaki (1979) Geology of the Komoro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 2p.)