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Kurahara Sandstone Member

• Coherent formation
• middle - late Miocene

• Sedimentary facies: Marine
• Lithofacies: Andesitic sandstone
• Lithofacies (Minor): Tuff, Pyroxene andesite tuff breccia, Lapilli tuff, Scoria tuff
• Sedimentary structures: Cross stratification

• Thickness: ca. 60 - 160 m
• Upper limit: Transitional (Takakubo Formation)
• Lower limit: Transitional (Omine Mudstone Member)

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

• Distribution: Kuwayama, Nanto city, Toyama pref.
• Fossils: Foraminifera (Haprohragmoides sp.), Teredo sp.
• Fossils (Shellfishes): Anadara yunotaniensis, Astarte sp., Brachidontes sp., Coraeophos iwakianus, Dentalium yokoyamai, Dosinia sp., Limopsis tajimae, Modiolus sp., Panope sp., Patinopecten kagamiunus, Patinopecten kimurai, Phaxas izumoensis, Siliqua sp., Sinum yahei, Venericardia sp.

• Inoue et al. (1964) Johana, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 5p.)