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On-Pm1 Tephra Kobayashi, 1960

Abbr.: On-Pm1

Invalid synonym: Pm-I, UP (Omiya Terrace)

• Tephra
• Pleistocene (0.1 - 0.95 Ma; MIS 5c; 95.7 ka, ¹⁸O; 82 ka, U-Th; 90 - 70 ka, FT; 100 ka, TL)
• Correlation: Ka-1?

• Lithofacies: Volcanic ash, Pumice

• Source: Mamahahadake volcano group
• Host: Nakamura Formation, Nakaya Loam, Omiya Formation, Hitsujiyama Loam, Joso Formation, Shimosueyoshi Loam, Narimasu Formation, Sagamihara Terrace Deposit, Oshika Gravel Bed
• Thickness: ca. 3 cm - 1 m

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

• Distribution: Tohoku region - Chubu region, Honshu island, Japan; Lake Tsurugaike, Shimogo city, Minamiaizu county, Fukushima pref.; Mimakigahara, Komoro city, Nagano pref.; Tenryu river, Ina city, Nagano pref.; Nishiaraijuku, Kawaguchi city, Saitama pref.; Sankoji, Kisarazu city, Chiba pref.; Nomugitoge pass, Takane town, Takayama city, Gifu pref.

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