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Shiraishi Sandstone and Mudstone Member (Shiida and Shibata, 1968) Nishioka et al., 2001

Invalid synonym: Shiraishi Formation

• Type locality: Shiraishi town, Tsuge, Nara city, Nara prefecture
• Coherent formation
• middle Miocene
• Correlation: Onigatsuji Mudstone and Sandstone Member

• Lithofacies: Interbedded sandstone and mudstone
• Lithofacies (Minor): Conglomerate, Lignite

• Thickness: 10 - 30 m
• Upper limit: Transitional (Onomi Conglomerate Member)
• Lower limit: Unconformity (Hayama Formation)

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

• Distribution: Shiraishi town - Tomoda town, Tsuge, Nara city, Nara pref.
• Fossils: Pollen

• Sato et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.53-69 DOI
• Nishioka et al. (2001) Geology of the Sakurai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 141p. (in Japanese with English abstract 5p.)