Nakanami Mudstone Member

Nakanami Mudstone Member (Ikebe et al., 1948) Imai et al., 1966

Invalid synonym: Nakanami Formation

Coherent formation
Miocene

Lithofacies: Mudstone

Upper limit: Interfingered (Takabatake Conglomerate Member, MIo Sandstone Member)
Lower limit (North): bottom of Otomari Tuff
Lower limit (South): bottom of Mudstone horizon
Lower limit: Interfingered (Upper Shingu Sandstone and Conglomerate Member)

Yatsuo Group (Himi, Toyama pref.)
[ Upper ]
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Mio Sandstone Member
'''''''/,,,,,,
Nakanami Mudstone Member
'''''''/,,,,,,
Upper Shingu Sandstone and Conglomerate Member
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[ Lower ]

Yatsuo Group (Nadaura, Toyama pref.)
[ Upper ]
--------------
Nakanami Mudstone Member
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Kakefuda Sandstone Member
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Sekidosan Conglomerate Member
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[ Lower ]

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

Distribution: Nakanami - Nakata - Takado, Himi city, Toyama pref.; Mikohara - Hashiri, Hakui city, Ishikawa pref.
Fossils: Sponges (Makiyama chitanii)
Fossils (Shellfishes): Conchocele nipponica, Dentalium sp., Lucinoma sp., Palliorum peckhami, Schizaster sp.
Tephra: Otomari Tuff, Ogawa Tuff

Imai et al. (1966) Geology of the Ochigata and Abugashima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 67p. (in Japanese with English abstract 4p.)