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Sennan Rhyolites (Ichikawa and Ohashi, 1965) Ichihara et al., 1986

• Volcanic rocks
• Possibly a volcano-plutonic complex with Kogigawa Granite
• Late Cretaceous, Campanian (75.3, 77.4 Ma, FT; 88.0, 90.4 Ma, K-Ar)
• Intruded by: Kogigawa Granite, Nabeyama Andesite, Granite porphyry, Quartz porphyry, Diorite porphyry

• Lithofacies: Rhyolite, Rhyolitic dacite
• Lithofacies: Welded tuff

• Thickness: 2,00 - 4,000 m
• Distribution (Length): 25 km
• Upper limit: Abut unconformity (Kasayama Conglomerate Member)
• Lower limit: Unconformity (Ogawa Andesite)

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

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

• Distribution: Sennan city, Osaka pref., Mount Iwakusan - Amami, Kawachinagano city, Osaka pref.; Kitayama, Gojo city, Nara pref.; Awaji island, Hyogo pref.

• Seike et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.12, pp.759-775 DOI
• Kano and Takagi (2013) Jour. Geol. Soc. Japan, vol.119, no.12, pp.776-793 DOI
• Itihara et al. (1986) Geology of the Kishiwada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 148p. (in Japanese with English abstract 7p.)