Sunagozaka Formation

Sunagozaka Formaiton

Invalid synonym: Sunagozaka Tuffaceous Alternation Member

Coherent formation
Miocene
Intruded by: Basalt dykes

Sedimentary facies: Marine?
Lithofacies: Tuffaceous sandstone, Tuffaceous mudstone
Lithofacies (Minor): Rhyolite tuff, Tuff breccia

Thickness: ca. 60 - 170 m
Upper limit: Transitional, partly unconformity (Nanamagari Tuff Member), Unconformity (Omma Sandstone Member)
Lower limit: Transitional (Iozen Formation)

Yatsuo Group (Kanazawa, Ishikawa pref.)
[ Upper ]
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Asagaya Mudstone Member
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Nanamagari Tuff Member
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Sunagozaka Formation
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[ Lower ]

Yatsuo Group (Iozen, Ishikawa pref. - Toyama pref.)
[ Upper ]
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Omine Mudstone Member
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Doyama Tuffaceous Member
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Sunagozaka Formation
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Iozen Formation
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[ Lower ]

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

Distribution: Ichinose town - Kitabukuro town - Nozoki - Nakato town - Asanogawa river, Kanazawa city, Ishikawa pref.
Fossils: Echinoids (Astriclypeus manni, Echinolampas yoshiwarai), Foraminifera (Operculina complanata japonica), Footprints (Mammalia)
Fossils (Shellfishes): Anadara watanabei, Babylonia kokozurana, Chlamys nisataiensis, Ostrea gravitesta, Phaxus izumoensis, Protorotella yuantaniensis, Solidicorbula nisataiensis, Turritella neiensis
Fossils (Plants): Comptoniphyllum naumanni, Liquidamber sp., Mangroves (Pollen)

Yamanoi et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.5, pp.262-266 DOI
Inoue et al. (1964) Johana, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 5p.)
Imai (1959) Kanazawa, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 27p. (in Japanese with English abstract 3p.)