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Kamimatsubara Formation

• Type locality: Kamimatsubara, Aridagawa city, Arida county, Wakayama prefecture
• Coherent formation
• Late Cretaceous, Turonian

• Lithofacies (Upper): Shale
• Lithofacies (Lower): Sandstone
• Lithofacies (Lower, Minor): Shale
• Lithofacies (Basal): Conglomerate

• Thickness: ca. 400 m
• Thickness (Upper): ca. 150 m
• Thickness (Lower): ca. 220 m
• Thickness (Basal): ca. 8 m
• Upper limit: Disconformity (Matsubara Formation)
• Lower limit: Disconformity (Izeki Formation), Unconformity (Kurosegawa Belt)

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

• Distribution: Kamimatsubara - Itogawa, Aridagawa city, Arida county, Wakayama pref.
• Fossils: Inoceramus sp.

• Yao (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.90-106 DOI
• Hirayama and Tanaka (1956) Todorogi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 37p. (in Japanese with English abstract 11p.)
• Hirayama and Tanaka (1956) Kainan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 12p.)