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Yoroiiwa Lava and Dike

• Type locality: Yoroiiwa, Kai city, Yamanashi prefecture
• Volcanic rocks
• early Pleistocene
• Intruded in: Kurofuji Pyroclastic Flow Deposit

• Sedimentary facies: Dykes (2 dykes), Lava flow
• Lithofacies: Andesite lava

• Thickness: 40 m or thicker
• Distribution (Dykes, Width): 20 - 40 m
• Upper limit: Unconformity (Onnaiwa Lava)
• Lower limit: Conformity (Yoroiiwa Pyroclastic Flow Deposit), Unconformity (Kurofuji 4th-stage Pyroclastic Flow Deposit, Kurofuji 3rd-stage Pyroclastic Flow Deposit)

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

• Distribution: Yoroiiwa, Kai city, Yamanashi pref.

• Mimura et al. (1984) Geology of the Mitake-Shosenkyo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 61p. (in Japanese with English abstract 4p.)