Okaya Gravels Member

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Okaya Gravels Member Yoshida et al., 2003

Type locality: Okaya, Ryuo city Gamo county, Shiga prefecture
Coherent formation
Pliocene - Pleistocene

Sedimentary facies: Terrestrial
Lithofacies (Upper): Silt
Lithofacies (Middle): Gravels, Sands
Lithofacies (Lower): Gravels
Sedimentary structures: Upward fining

Thickness: 50 - 60 m
Lower limit: Transitional (Hie Alternation Member), Unconformity ((Yasu Granite)

Gamo Formation (Kosei, Shiga pref.)
[ Upper ]
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Okaya Gravels Member
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Hie Alternation Member
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Yamanaka Gravels Member / Shinohara Clays Member
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Shimoyama Alternation Member
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[ Lower ]

Kobiwako Group
[ Upper ]
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Takashima Formation
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Katata Formation
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Kusatsu Formation
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Gamo Formation
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Koka Formation
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Ayama Formation
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Iga Formation
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Ueno Formation
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[ Lower ]

Second Setouchi Supergroup (Shiga pref.)
[ Upper ]
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Kobiwako Group
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[ Lower ]

[ Upper ]
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Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
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[ Lower ]

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

Distribution: Okaya - Dragon hat - Matsugaoka - Kuzushi, Ryuo city Gamo county, Shiga pref.; Shimoda, Konan city, Shiga pref.

Yoshida et al. (2003) Geology of the Omi-Hachiman District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 3p.)