The geologic development of the southern Ku Peninsula was summarized and its bearing on the geologic development of the Japanese Islands was briefly discussed. The southern Ku Peninsula is geologically called as Shimanto Terrane which have developed as a forearc region at the continental margin of Asia continent from Cretaceous to present. The Hidakagawa Belt,the northernmost part of the terrane, is underlain by Cretaceous accretionary complex and forearc basin sediments, and the Otonashigawa Belt is composed of early Pageogene accretionary complex. The southernmost part, Muro Belt, comprises of late Paleogene thick forearc basin sediments. The geologic analysis of the accretionary complex in the Shimanto Terrane contributed so much to understand the onland accretionary complex of the world and the Japanese Islands that the Shimanto Terrane is well known as a most typical example of ancient accretionary complex of the world.
展开▼
