Tanashigawa Member

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Tanashigawa Member Yoshino, 1982

Type locality: Hikageiri forest road, Takato, Ina city, Nagano prefecture
Volcanic rocks
Miocene
Correlation: Daijima Formation, Nishikurosawa Formation

Lithofacies: Sandstone, Conglomerate
Lithofacies (Minor): Tuff, Gravelly sandstone, Tuffaceous sandstone
Sedimentary structures: Graded bedding

Thickness: 180 - 250 m
Upper limit: Transitional (Ushiroyama Member)
Lower limit: Conformity (Furuyashiki Member)

Moriya Formation
[ Upper ]
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Karasawagawa Member
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Kumakubo Member
'''''''/,,,,,,
Takabe Member
'''''''/,,,,,,
Ushiroyama Member
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Tanashigawa Member
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Furuyashiki Member
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Usuzawa Member
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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: Hikageiri forest road - Furuyashiki - Mount Mitsumine, Takato, Ina city, Nagano pref.
Fossils (Shellfishes): Dosinia fujimotoi, Saccella cf. nagaoi, Venericardia akagii, Venerupis (Shiratoria) siratoriensis
Fossils (Daijima-type flora): Pollen

Makimoto et al. (1996) Geology of the Takato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 114p. (in Japanese with English abstract 6p.)