Yada Sandstone Member

Invalid synonym: Midarebashi Sand Member, Amaharashi Tuffaceous Sand Member

Type locality: Toyama prefecture
Coherent formation
early Pleistocene
Correlation: Omma Sandstone Member

Sedimentary facies (Minor): Reef deposit
Lithofacies: Sandstone
Lithofacies (Minor): Reef calcareous sandstone
Sedimentary structures (Minor): Cross stratification

Thickness: ca. 200 m
Upper limit: Conformity (Jokoji Mudstone Member), Unconformity (Kamitako Gravel and Clay, Hanyu Formation)
Lower limit: Conformity (Futakami Siltstone Member)

Himi Formation (Mount Futakami, Toyama pref.)
[ Upper ]
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Jokoji Mudstone Member
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Yada Sandstone Member
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Futakami Siltstone Member
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[ Lower ]

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

Distribution: Midarebashi - Ebizaka, Himi city, Toyama pref.; Amaharashi seashore, Takaoka city, Toyama pref.
Fossils (Amaharashi seashore): Echinoids (Echinarachnius mirabilis), Plants (Nyssa sylvatica, Seeds)
Fossils (Amaharashi seashore, Shellfishes): Acila sp., Cardium sp., Chlamys cosibensis, Chlamys swifti, Clypidina sp., Ostrea sp., Patinopecten kurosawaensis, Patinopecten tokyoensis, Solen sp., Tellina sp., Thyasira bisecta, Turritella sp., Umbonium subsuchiense

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.)