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Nagusayama Formation Yamamoto et al., 2000
- Type locality: Mount Nagusayama, Fukusaki city, Kanzaki county, Hyogo prefecture
- Volcanic rocks
- Large scale caldera-fill deposit
- Late Cretaceous (67.1 Ma, FT)
- Intruded by: Tsurui Body, Hornblende biotite granodiorite porphyry
- Sedimentary facies: Pyroclastic flow deposits
- Lithofacies: Biotite rhyolite lapilli tuff
- Lithofacies (Upper, Minor): Andesite lava, Lapilli tuff
- Lithofacies (Middle, Minor): Biotite-bearing rhyolite welded tuff
- Lithofacies (Lower, Minor): Rhyolite - Dacite welded tuff, Lapilli tuff
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Nagusayama, Fukusaki city, Kanzaki county, Hyogo pref.
- Yoshikawa et al. (2005) Geology of the Ikuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 3p.)
- Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)