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Hata Formation Katada and Isomi, 1964

• Accretionary complex
• Jurassic

• Sedimentary facies: Marine
• Lithofacies: Mudstone, Sandstone
• Lithofacies (Minor): Chert

• Thickness: ca. 2,000 m
• Lower limit: Bottom of the horizon of sandstone including slate fragments
• Lower limit: Transitional (Nomata Formation)

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

• Distribution: Kurokawa river, Hata, Matsumoto city, Nagano pref.; Karasawagawa river, Yamagata city, Higashichikuma county, Nagano pref.
• Fossils: Plant fragments
• Fossils (Trace fossils): Helminthoidea isp.

• Katada and Isomi (1964) Shiojiri, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 10p.)