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Hoden Formation Ozaki and Harayama, 2003

• Type locality (Upper): Lake Haigaike, Kamiso town, Kakogawa city, Hyogo prefecture
• Type locality (Middle): Gongen-daini dam, Kakogawa city, Hyogo prefecture
• Type locality (Lower): Kibita town, Ono city, Hyogo prefecture
• Volcanic rocks
• Late Cretaceous (73 Ma, FT)
• Intruded by: Hoden Granite, Granite porphyry dikes

• Sedimentary facies (Upper): Lacustrine
• Lithofacies (Upper): Tuffaceous siltstone, Tuffaceous sandstone
• Lithofacies (Upper, Minor): Conglomerate
• Lithofacies (Middle): Rhyolite lava, Hyaloclastite
• Lithofacies (Lower): Pyroclastic flow deposits
• Sedimentary structures (Middle): Flow structure, Spherule structure
• Sedimentary structures (Lower): Eutaxitic structure

• Thickness: 2,500 m or thicker
• Thickness (Upper): ca. 70 - 100 m
• Thickness (Middle): 1,500 m or thicker
• Thickness (Lower): 400 m or thicker

• Distribution: Kibita town - Kishi town - Harima golf field, Ono city, Hyogo pref.; Hoshoji - Shimoishino - Wada, Miki city, Hyogo pref.; Kamiso town - Gongendaini dam - Shiroyama - Lake Heisoko - Iwao - Nishiiwao- Nejimatsu - Mount Iimoriyama - Mount Takamikuraiyama - Hiokayama - Saijo - Ishimori - Uehara, Kakogawa city, Hyogo pref.; Mount Higasayama, Himeji city, Hyogo pref.; Nishihama - Amida town - Hoden - Kitahama town, Takasago city, Hyogo pref.

• Ozaki and Harayama (2003) Geology of the Takasago District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 87p. (in Japanese with English abstract 3p.)