Kichiyasu Sandstone, Mudstone and Conglomerate Member

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Kichiyasu Sandstone, Mudstone and Conglomerate Member

Type locality: Kichiyasu, Yokawa town, Miki city, Hyogo prefecture
Coherent formation
Eocene - Oligocene
Contemporaneous heterotopic facies (Partly): Harasaka Mudstone Member

Sedimentary facies: Fluvial
Sedimentary facies: Meandering river, Braided river
Lithofacies: Sandstone, Mudstone, Conglomerate
Sedimentary structures: Upward fining, Channel structure, Cross stratification, Parallel stratification, Imbrication structure
Paleocurrent: from North, from West

Thickness: 170 - 270 m
Upper limit: Transitonal (Harasaka Mudstone Member), Conformity (Hosokawa Formation)
Lower limit: Bottom of the thick sandstone bed or the sandstone-conglomerate dominant horizon
Lower limit: Conformity (Nagao Sandstone and Mudstone Member)

Yokawa Formation
[ Upper ]
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Harasaka Mudstone Member
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Kichiyasu Sandstone, Mudstone and Conglomerate Member
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Nagao Sandstone and Mudstone Member
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[ Lower ]

Kobe Group (Sanda, Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Hosokawa Formation
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Yokawa Formation
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Sanda Formation
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[ Lower ]

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

Distribution: Kichiyasu, Yokawa town, Miki city, Hyogo pref.; Tojo, Kato city, Hyogo pref.; Mikage, Ogo town, Kobe city, Hyogo pref.
Tephra: Kitahata Tuff, Kamikume Tuff, Ishigamiyama Tuff

Ozaki and Matsuura (1988) Geology of the Sanda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)