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Takatori Volcaniclastic Rocks, Sandstone and Mudstone Member (Matsuda, 1961) Ozaki and Sugiyama, 2018

Invalid synonym: Nakanosawa Member, Sugio Member

• Type locality: north of Mount Takatoriyama, Minobu city, Minamikoma county, Yamanashi prefecture
• Volcanic rocks
• late Miocene (9.3 Ma, K-Ar; Foraminifera)
• Correlation: Tokuma Member
• Correlation (Upper): Hakii Interbeds of Sandstone and Mudstone Member?
• Intruded by: Aimata Intrusive Rocks

• Sedimentary facies: Marine
• Sedimentary facies: Submarine volcano
• Sedimentary facies (Upper): Small lava domes, Turbidite
• Sedimentary facies: Large lava dome (ca. 5,800 m (D), 930 m or thicker (H)), Debrite
• Lithofacies (Upper): Tuffaceous sandstone, Interbedded andesite volcaniclastic rocks and mudstone, Mudstone, Interbedded mudstone and sandstone
• Lithofacies: Andesite lava, Pillow lava, Volcanic breccia, Tuff breccia, Hyaloclastite
• Lithofacies (Minor): Andesite reworked volcanic breccia, Lapilli tuff, Tuff
• Sedimentary structures: Graded bedding, Parallel stratification

• Source: north of Mount Karasumoriyama, Yamanashi pref.
• Thickness: ca. 200 - 2,300 m
• Thickness (Turbidite): ca. 1,500 m or thicker
• Thickness (Debrite): 950 m
• Thickness (Lava dome): 930 m or thicker
• Upper limit: Conformity (Karasumoriyama Volcaniclastic Rocks Member), Unconformity (Teuchizawa Breccia Member, Osozawa Sandstone Member)
• Lower limit: Conformity (Kuonji Formation, Hara Formation)

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

• Distribution: Mount Takatoriyama - Minobu - Odafunahara - Ojiro - Awakura - Osozawa - Yogosawa, Minobu city, Minamikoma county, Yamanashi pref.; Akasawa - Konawa - Hajikajima - Kuretsubo - Sensuwa, Hayakawa city, Minamikoma county, Yamanashi pref.
• Fossils (Shellfishes): Anadara sp., Cardium sp., Dentalium sp., Glycymeris sp., Megacardita oyamai, Turcicula crumpi

• Ozaki and Sugiyama (2018) Geology of the Minobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 169p. (in Japanese with English abstract 7p.)