Idaka Member

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Idaka Member

Coherent formation
Fluvio-lacustrine basin including Lake Tokai
Pliocene

Sedimentary facies: Fluvial, Lacustrine
Lithofacies: Interbedded gravels, sands and silt
Sedimentary structures: Imbrication structure
Paleocurrent: from Northeast to Southwest

Thickness: A few dozen m

Yadagawa Formation
[ Upper ]
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Idaka Member
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Takabari Member
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Nisshin Member
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[ Lower ]

Tokai Group (Nagoya, Aichi pref.)
[ Upper ]
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Yadagawa Formation
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Fujioka Formation
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Seto Porcelain Clay Formation
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[ Lower ]

Second Setouchi Supergroup (Mie pref. - Aichi pref.)
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Tokai Group
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[ Upper ]
~~~~~~~~~~~~~~
Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Ryusenji - Moriyama - Higashiyama - Takinomizu - Takaneyama, Nagoya city, Aichi pref.

Nakashima et al. (2021) Geology of the Toyota District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 91p. (in Japanese with English abstract 4p.)
Sakamoto et al. (1986) Geology of the Nagoya-Nambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 3p.)
Sakamoto et al. (1984) Geology of the Nagoya-Hokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 64p. (in Japanese with English abstract 3p.)