[ Top ] [ Japanese ]

Miyukida Fan Deposit (Oshima, 1986) Geshi and Takeuchi, 2012

Invalid synonym: Miyukida Mudflow Deposit

• Type locality: Miyukida, Shibukawa city, Gunma prefecture
• Coherent formation
• Pleistocene (ca. 10 ka)

• Sedimentary facies: Fluvial
• Sedimentary facies: Alluvial fan deposit
• Lithofacies: Pyroxene andesite volcanic breccia, Volcanic conglomerate, Lapilli, Volcanic sands, Clay

• Source: Older Haruna Volcanic Fan Deposits at the vicinity of Mizusawayama lava dome
• Lower limit: Unconformity (Older Haruna Volcanic Fan Deposits)

• Distribution: Karasawa river - Nakasuji, Miyukida, Shibukawa city, Gunma pref.

• Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)