Ikaga Formation

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Ikaga Formation (Takaya and Ichihara, 1961) Miyachi et al., 2001

Type locality: Ikaga, Hirakata city, Osaka prefecture
Coherent formation
Pliocene - Pleistocene

Sedimentary facies: Fluvial, Lacustrine
Lithofacies: Sands, Gravels
Lithofacies (Minor): Silt
Sedimentary structures: Planar cross-stratification, Trough cross-stratifiction

Thickness: ca. 30 m or thicker
Upper limit: bottom of Ma 2

Osaka Group (Hirakata, Osaka pref.)
[ Upper ]
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Shinkori Formation
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Kori Formation
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Ikaga Formation
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[ Lower ]

Second Setouchi Supergroup (Osaka pref. - Hyogo pref.)
[ Upper ]
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Osaka Group
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[ Lower ]

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

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

Distribution: Ikaga - Korien town - Hirakatamotomachi town - Shikinaiigami shrine, Hirakata city, Osaka pref.; Hoshida, Katano city, Osaka pref.
Key bed (Upper, Marine clay): Ma 1

Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)