Mori Member

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Mori Member Iijima and Saito, 1968

Type locality: Sawayama river, Mori, Chikuma city, Nagano prefecture
Coherent formation
middle Miocene
Contemporaneous heterotopic facies: Toyosaka Member

Lithofacies: Shale
Lithofacies (Minor): Interbedded shale and sandstone, Tuffaceous sandstone, Siltstone, Dacite tuff

Thickness: ca. 330 - 700 m or thicker
Upper limit: Top of t3 Dacite Tuff
Upper limit: Conformity (Bessho Formation)
Lower limit: Bottom of t1 Dacite Tuff
Lower limit: Conformity (Yokoo Formation)

Mori Member
[ Upper ]
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t3 Dacite Tuff
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t2 Dacite Tuff
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t1 Dacite Tuff
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[ Lower ]

Uchimura Formation (Northern part)
[ Upper ]
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Mori Member / Toyosaka Member
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Yokoo Member => Yokoo Formation
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Taroyama Member => Taroyama Formation
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Omineyama Member => Omineyama Formation
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[ Lower ]

Chushin Group
[ Upper ]
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Bessho Formation
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Uchimura Formation
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Moriya 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: Sawayama river, Mori, Chikuma city, Nagano pref.; Kurashina - Mount Omine, Chikuma city, Nagano pref.; Jizo pass - Mount Takato - Inaba, Nagano city, Nagano pref.; Hinazawa river - Minamihina, Sakaki city, Hanishina county, Nagano pref.; Hiraiji - Zenzanji, Ueda city, Nagano pref.
Fossils: Shark (Teeth), Fish scales, Foraminifera, Sponges (Makiyama chitanii), Plants (Conifers)
Fossils (Bivlaves): Cyclammina ezoensis, Palliolum peckhami

Kato and Akahane (1986) Geology of the Nagano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 120p. (in Japanese with English abstract 5p.)
Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)