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Kizaki Formation Kobayashi and Tanaka, 1953

• Coherent formation
• Jurassic
• Intruded by: Porphyrite dykes

• Sedimentary facies: Shallow marine
• Sedimentary facies: Inner bay
• Lithofacies: Shale
• Lithofacies (Minor): Sandstone, Conglomerate
• Sedimentary structures: Graded bedding, Cross stratification

• Distribution (East - West): 1.5 - 2.5 km
• Distribution (South - North): ca. 10 km
• Upper limit: Unconformity (Sanozaka Collapse Deposits)

• Distribution: Lake Kizakiko - Taira - Sanosaka pass, Omachi city, Nagano pref.; Sawado, Hakuba city, Kitaazumi county, Nagano pref.
• Fossils: Bivalves (Oxytoma sp.), Radiolarians (Nassellaria gen. et sp. indet.)
• Fossils (Plants): Dictyozamites sp., Nilssonia cf. orientalis

• 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.)