Sasori Tuff Breccia

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Sasori Tuff Breccia (Yoshida, 1975) Yoshida and Kawata, 1987

Invalid synonym: Sasori Welded Tuff

Type locality: Shimosasori - Nishibu?, Oharano, Takarazuka city, Hyogo prefecture
Volcanic rocks
Late Cretaceous
Intruded by: Kashihara Quartz Gabbro, Mikusayama Granitic Complex, Granite porphyry dike, Quartz porphyry dike, Diorite porphyry dike

Sedimentary facies: Caldera-collapse deposit
Sedimentary facies (Marginal): Debris avalanche deposit
Sedimentary facies (Minor): Lacustrine
Lithofacies: Biotite welded tuff breccia, Lapilli tuff
Lithofacies (Minor): Tuffaceous conglomerate, Tuffaceous sandstone, Mudstone, Tree trunks

Thickness: 700 m or thicker
Distribution (East - West): ca. 19 km
Distribution (South - North): ca. 14 km
Upper limit: Unconformity (Toishigawa Mudstone and Sandstone Member)
Lower limit: Abut unconformity (Moshi Welded Tuff, Sakaino Formation, Furuichi Complex)

Arima Group (Sonobe, Kyoto pref.)
[ Upper ]
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Sasori Tuff Breccia
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Rurikei Formation
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[ Lower ]

Arima Group (Sanda, Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Sasori Tuff Breccia
~~~~~~~~~~~~~~
Moshi Welded Tuff
~~~~~~~~~~~~~~
[ Lower ]

Arima Group (Takarazuka, Hyogo pref.)
[ Upper ]
~~~~~~~~~~~~~~
Sasori Tuff Breccia
~~~~~~~~~~~~~~
Sakaino Formation
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Tamaze Formation
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Takedao Formation
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[ Lower ]

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

Distribution: Shimosasori - Nishibu? - Lake Sengari-suigenchi - Oharano, Takarazuka city, Hyogo pref.; Tono - Komori -Tannan town - Shitsukawa, Tambasasayama city, Hyogo pref.; Moshi - Eitakuji - Mount Hatsukayama, Sanda city, Hyogo pref.; Kaibara - Mount Onoyama - Komoo - Sugio, Inagawa city, Kawabe county, Hyogo pref.; Nagatani, Nose city, Toyono county, Osaka pref.

Matsuura et al. (1995) Geology of the Hirone District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 110p. (in Japanese with English abstract 6p.)
Kurimoto et al. (1993) Geology of the Sasayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
Imoto et al. (1991) Geology of the Sonobe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 4p.)
Ozaki and Matsuura (1988) Geology of the Sanda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)