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Sakugi Volcanic Rocks Yoshida, 1961

• Type locality: Gonokawa river, Otsu - Ikawashi, Miyoshi city, Hiroshima prefecture
• Volcanic rocks
• Eocene (54, 38.3 Ma, K-Ar)
• Correlation: Sakurae Group
• Intruded by: Kuchiwa Diorites, Asuna Granite, Felsic rock dikes, Rhyolite dikes, Porphyrite dikes

• Sedimentary facies (Minor): Lacustrine
• Lithofacies (Upper): Dacite lapilli tuff, Lava
• Lithofacies (Middle): Andesite pyroclastic rocks, Lava
• Lithofacies (Middle, Minor): Tuffaceous sandstone Mudstone
• Lithofacies (Lower): Dacite lapilli tuff
• Lithofacies (Lower, Minor): Rhyolite lapilli tuff
• Lithofacies (Bottom): Andesite lava

• Thickness: 1,000 - 2,000 m
• Distribution: 9 x 7 km²
• Upper limit: Unconformity (Bihoku Group)
• Lower limit: Unconformity (Shinzojiyama Volcanic Rocks, Togochi Sandstone Member)

• Distribution: Otsu - Ikawashi - Gonokawa river - Mitsumori - Moriyama - Surutaki fall, Miyoshi city, Hiroshima pref.; Ayame - Hinagawa - Kuchiba, Onan city, Ochi county, Shimane pref.
• Fossils (Plants): Acer paleomiyabei, Alnus sp., Betula sp., Bingopitys cycadoides, Buxus? sp., Carpinus sp., Cladrastis sakuginensis, Droypteris sp., Fagus? sp., Gleichenia sp., Juglans sp., Pinussp., Platanus sp., Pterocaya? sp., Quercus sp., Salix sp., Sequoia sp., Tilia multicostata, Ulmus sp., Vibrunum antiquum

• Matsuura (1990) Geology of the Akana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 5p.)