[ Top ] [ Japanese ]

Basalt Shale Unit

• Middle - lower crust of a Paleozoic volcanic island arc (Yakuno paleo-island arc) in the ocean
• Ophiolite originated from oceanic type, island-arc type and back-arc basin type oceanic crusts
• Permian

• Lithofacies: Slate
• Lithofacies (Minor): Sandstone, Conglomerate

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

• Distribution: Chihara, Yakuno townFukuchiyama city, Kyoto pref.

• Hirokawa (1954) Tajima-Takeda, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 20p. (in Japanese with English abstract 9p.)