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Nagao Sandstone and Mudstone Member

• Type locality: Nagao town, Kobe city, Hyogo prefecture
• Coherent formation
• Eocene - Oligocene

• Sedimentary facies: Meandering river, Braided river
• Lithofacies: Sandstone, Mudstone
• Lithofacies (Minor): Conglomerate
• Sedimentary structures: Channel structure, Trough cross-stratification, Parallel stratification

• Thickness: 30 - 150 m
• Upper limit: Bottom of the thick sandstone bed or the sandstone-conglomerate dominant horizon
• Upper limit: Conformity (Kichiyasu Sandstone, Mudstone and Conglomerate Member)
• Lower limit: Bottom of the horizon including thick sandstone and conglomerate beds
• Lower limit: Conformity, partly Transitional (Shimoisawa Mudstone Member)

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

• Distribution: Nagao town - Hata town, Kobe city, Hyogo pref.; Ikejiri - Sawadanikaitaku - Kamiarakawa, Sanda city, Hyogo pref.; Fukui, Yokawa town, Miki city, Hyogo pref.; Eifuku - Nagasada, Tojo, Kato city, Hyogo pref.

• 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.)