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Terasoma Formation

• Forearc basin sediments
• Late Cretaceous, Turonian - Campanian (Radiolarians)

• Sedimentary facies: Marine
• Sedimentary facies: Continental shelf, Upper continental slope
• Lithofacies: Sandstone
• Lithofacies (Minor): Shale, Siliceous shale, Limestone
• Lithofacies (Bottom): Conglomerate

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

• Distribution: Wakayama pref.
• Fossils (Shellfishes): Cucullaea sp., Inoceramus sp.
• Fossils (Radiolarians): Cenosphaera sp.

• Yao (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.90-106 DOI
• Tokiwa et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.6, pp.270-273 DOI
• Win et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.4, pp.133-145 DOI
• Hirayama and Tanaka (1956) Kainan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 12p.)