Nishi-Toyama Sandstone Member

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Nishi-Toyama Sandstone Member

Invalid synonym: Nishitoyama Formation

Type locality: Toyama prefecture
Coherent formation
Pliocene

Lithofacies: Muddy sandstone
Lithofacies (Minor): Siltstone

Thickness: ca. 100 m
Upper limit: Top of O₂ Tephra
Upper limit: Unconformity (Anyobo Sandstone and Mudstone Alternation Member, Kureha Pyroclastic Member)

Otogawa Formation (Mount Kureha, Toyama pref.)
[ Upper ]
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Nishitoyama Sandstone Member
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[ Lower ]

Tonami Group
[ Upper ]
~~~~~~~~~~~~~~
Mita Formation
~~~~~~~~~~~~~~
Otogawa Formation
~~~~~~~~~~~~~~
Tenguyama Formation
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[ Lower ]

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

Distribution: Kurehayama hills - Teramachi town - Tomosaka, Toyama city, Toyama pref.
Fossils: Shellfishes (Natica sp.)
Tephra: O₂, Teramachi Tephra

Tamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.1-20 DOI
Sakamoto (1963) Toyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 45p. (in Japanese with English abstract 6p.)