Agero Member

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Agero Member Sai-kawa Research Group, 1966

Type locality: Jishihara - Hojo, Yasaka, Omachi city, Nagano prefecture
Coherent formation
Miocene

Lithofacies: Sandy mudstone
Lithofacies (Minor): Interbedded sandstone and mudstone, Sandstone

Thickness: 450 m or thicker
Lower limit: Transitional (Nodaira Member)

Aoki Formation (Nagano, Nagano pref.)
[ Upper ]
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Asakawa Member
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Hitoeyama Member
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[ Lower ]

Aoki Formation (Matsumoto, Nagano pref.)
[ Upper ]
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Kitayama Mudstone and Sandstone Member
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Hakumaki Sandstone and Conglomerate Member
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[ Lower ]

(Invalid) Aoki Formation (Togakushi, Nagano pref.)
[ Upper ]
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Asakawa Mudstone Member
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Senmi Sandstone Mudstone Member => Ronji Formation
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Nishikyo Mudstone Member
?--?--?--?--?-
[ Lower ]

(Invalid) Aoki Formation (Omachi, Nagano pref.)
[ Upper ]
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Agero Member
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Nodaira Member
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Hosei Member
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Sodeyama 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: Jishihara - Hojo, Yasaka, Omachi city, Nagano pref.
Fossils (Foraminifera): Eponides cf. frigidus

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.)