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Amagi volcano

• Volcanic rocks
• Shield volcano
• middle Pleistocene - Holocene

• Sedimentary facies (Mount Hachikuboyama): Volcanic cone
• Sedimentary facies (Dacite): Lava dome
• Sedimentary facies (Basalt): Parasitic cone
• Lithofacies (Basalt): Pigeonite series
• Lithofacies (Andesite): Hypersthene series
• Lithofacies (Upper): Hypersthene hornblende dacite pumice, Obsidian
• Lithofacies (Middle): Basalt lava
• Lithofacies (Main part): Two-pyroxene andesite, Olivine two-pyroxene andesite lava
• Lithofacies (Main part, Main part): Hypersthene andesite, Hornblende two-pyroxene andesite

• Source (Basalt): Mount Hachikuboyama
• Source (Dacite): Kawagodaira
• Thickness (Main part): 400 - 600 m
• Thickness (Main part, A unit): 100 m or thinner
• Thickness (Dacite): ca. 20 m
• Distribution (Diameter): ca. 15 km
• Distribution (Width, Dacite): ca. 1 km
• Running distance (Dacite): 4 km
• Lower limit: Unconformity (Kamo Andesites, Tenshi volcano, Tanaba volcano, Shirada Dacite)

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

• Distribution: Mount Amagisan - Funabara hot spring - Mount Hachikuboyama - Jorennotaki lava - Kawagodaira, Izu city, Shizuoka pref.; Noborio, Nashimoto, Kawazu city, Kamo county, Shizuoka pref.; Mount Misujiyama - Mount Banzaburodake - Mount banjirodake, Higashiizu city, Kamo county, Shizuoka pref.

• Sawamura et al. (1970) Geology of the Shimoda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 41p. (in Japanese with English abstract 4p.)
• Ono and Sumi (1959) Inatori, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 3p.)
• Sawamura (1955) Shuzenji, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 47p. (in Japanese with English abstract 4p.)