A study of the structural geology of southern Okinawa reveals Paleozoic schists, the Shimajiri formation of Miocene- Pliocene age, the Ryukyu limestone of upper Pliocene or lower Pleistocene age, and Recent beach sands, coral reefs, and alluvium. Major physiographic effects are discussed. Only small supplies of water are expected from the limestone, sand, and alluvium deposits, and the Shimajiri formation.

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