Toyota Alternation Member

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Toyota Alternation Member Kobiwako Research Group, 1977

Type locality: Toyota - Nakayama, Hino city, Gamo county, Shiga prefecture
Coherent formation
Pleistocene

Sedimentary facies: Terrestrial
Sedimentary facies: Point bar
Lithofacies (Upper): Sandy silt, Silt
Lithofacies (Lower): Sands
Sedimentary structures: Trough cross-stratification, Planar cross-stratification, Parallel stratification

Thickness: ca. 80 - 120 m
Upper limit: Transitional (Gamodo Gravels Member)
Lower limit: Transitional (Yokigaoka Clays Member)

Gamo Formation (Minakuchi hills, Shiga pref.)
[ Upper ]
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Toyota Alternation Member
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Yokigaoka Clays Member
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Kiyota Alternation Member
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Hazama Clays 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: Toyota - Nakayama, Hino city, Gamo county, Shiga pref.; Yama, Minakuchi town, Koka city, Shiga pref.
Tephra: Kasuga, Tokutani

Nakano et al. (2003) Geology of the Minakuchi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 83p. (in Japanese with English abstract 3p.)
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.)
Ishida et al. (1984) Geology of the Hikone-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 6p.)