Amakata Sandstone Member

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Amakata Sandstone Member

Invalid synonym: Amanomiya Mudstone

Coherent formation
middle Miocene

Lithofacies: Sandstone
Sedimentary structures: Upward fining

Thickness: ca. 50 - 100 m
Upper limit: Transitional (Towata Mudstone Member)
Lower limit: Transitional (Haramishi Conglomerate Member)

Amenomiya Formation
[ Upper ]
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Towata Mudstone Member
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Amakata Sandstone Member
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Haramishi Conglomerate Member
~~~~~~~~~~~~~~
[ Lower ]

Kurami Group
[ Upper ]
~~~~~~~~~~~~~~
Matsuba Formation
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Amenomiya Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Morimachi city - Amanomiya - Iida - Haranoyagawa river, Shuchi county, Shizuoka pref.; Haraizumi, Kakegawa city, Shizuoka pref.
Fossils (Shellfishes): Caltellus izumoensis, Soletellina sp., Teredo sp., Turritella s-hataii, Yoldia sp.

Makiyama and Sakamoto (1957) Mitsuke & Kakezuka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)
Saito and Isomi (1954) Akihasan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 34p. (in Japanese with English abstract 10p.)