Hirabayashi Sandstone Member

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Hirabayashi Sandstone Member

Coherent formation
middle - late Miocene
Contemporaneous heterotopic facies: Jono Sandstone and Conglomerate Member, Wadagawabashi Conglomerate Member, Tenguyama Formation, Aoidani Mudstone Member

Lithofacies: Sandstone
Lithofacies (Minor): Conglomerate, Siltstone, Pumice tuff

Thickness: ca. 350 m
Upper limit: Conformity (Mita Formation)
Lower limit: Unconformity (Joyama Mudstone Member)

Otogawa Formation (Yatsuo, Toyama pref.)
[ Upper ]
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Hirabayashi Sandstone Member
~~~~~~~~~~~~~~
[ Upper ]

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

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

Distribution: Hirabayashi, Yatsuo town, Toyama city, Toyama pref.
Fossils: Echinoids (Linthia nipponica)
Fossils (Shellfishes): Cardium? sp., Dosinia ettyuensis, Glycymeris sp., Macoma sp., Mercenaria sp., Patinopecten tokyoensis, Teredo sp., Venericardia ferruginosa
Tephra: O₂

Sakamoto and Nozawa (1960) Yatsuo, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 8p.)