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Shirasawanokoru Clastic Bed (Kato et al., 1989) Harayama, 2015

Invalid synonym: Shirasawakoru Sandstone Bed

• Type locality: Shirasawanokoru, Omachi city, Nagano prefecture
• Coherent formation
• early Pleistocene

• Sedimentary facies: Lacustrine
• Lithofacies (Upper): Interbedded tuff and tuffaceous sandstone
• Lithofacies (Middle): Tuffaceous sandstone
• Lithofacies (Lower): Conglomerate
• Sedimentary structures: Graded bedding

• Thickness: 150 m
• Upper limit: Unconformity (Jiigatake Andesite)
• Lower limit: Unconformity (Tsubetaike Welded Tuff)

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

• Distribution: Shirasawanokoru - Akaiwa ridge - Mount Jiigatake, Omachi city, Nagano pref.

• Harayama (2015) Jour. Geol. Soc. Japan, vol.121, no.8, pp.293-308, DOI
• Kato et al. (1989) Geology of the Omachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 7p.)