Sashikiri Member

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Sashikiri Member Kobayashi and Isomi, 1950

Type locality: Shiga, Matsumoto city, Nagano prefecture
Coherent formation
Miocene
Intruded by: Quartz diorite, Porphyrite, Andesite sills, Basalt sills

Lithofacies: Conglomerate, Sandstone, Gravelly sandstone
Lithofacies (Minor): Sandy mudstone
Sedimentary structures: Graded bedding, Flute cast, Pipe rocks

Thickness: ca. 80 - 650 m
Upper limit: Conformity (Shige Member)
Lower limit: Conformity (Aoki Formation)

(Invalid name) Ogawa Formation (Nagano, Nagano pref.)
[ Upper ]
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Ronji Mudstone Member
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Susobana Tuff Member
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Koso Tuff
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Shige Member
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Sashikiri Member
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[ Lower ]

(Invalid name) Ogawa Formation (Komiji, Nagano pref.)
[ Upper ]
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Komiji Member
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Shige Member
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Sashikiri Member
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[ Lower ]

Hokushin Group
[ Upper ]
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Shigarami Formation
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Ogawa Formation
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Aoki Formation
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[ Lower ]

northern Nagano pref.
[ Upper ]
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Hokushin Group
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Chushin Group
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[ Lower ]

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

Distribution: Shiga, Matsumoto city, Nagano pref.; Omigawa river - Sashikiri hot spring, Omi city, Higashichikuma county, Nagano pref.; Mount Kamuriki - Mount Azumaya - Mount Kokuzo - Mount Obora, Chikuhoku city, Higashichikuma county, Nagano pref.; Machida - Wadaira, Ooka, Nagano city, Nagano pref.
Fossils: Ostrea, Pipe rocks

Kato et al. (1989) Geology of the Omachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 7p.)
Kato and Sato (1983) Geology of the Shinano-Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 7p.)
Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)