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Akusa Formation (Yoshida and Kawata, 1987) Kurimoto et al., 1993
Invalid synonym: Akusa Welded Tuff, upper Hie Formation
- Type locality: Akusa - Okuyama, Sannan town, Tamba city, Hyogo prefecture
- Volcanic rocks
- Late Cretaceous
- Interfingered: Kamogawa Formation
- Lithofacies: Biotite rhyolite welded tuff, Lava, Lapilli tuff, Sandstone, Conglomerate
- Lithofacies (Bottom): Conglomerate
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Akusa - Okuyama - Sasaba - Ibara - Nosaka - Hatauchi - Ishido, Sannan town, Tamba city, Hyogo pref.; Sasayama river, Kamitaki - Shimotaki, Tamba city, Hyogo pref.; Shimoogura - Murotani - Aguta - Oshinya, Kaibara town, Taamba city, Hyogo pref.; Fukuda - Asaka - Kamono, Hikami town, Tamba city, Hyogo pref.; Muranaka - Konae, Kurodasho town, Nishiwaki city, Hyogo pref.; Mount Matsuoyama - Konosaka, Tambasasayama city, Hyogo pref.
- Kobayashi and Goto (2008) Jour. Geol. Soc. Japan, vol.114, no.11, pp.577-586 DOI
- Kurimoto et al. (1993) Geology of the Sasayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
- 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.)