海岸平野の形成と第三紀末期以降の海水準変動

概要

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The coastal Plains in Japanese Islands can be explained as the sedimentary basins in Pliocene epoch and Quarternary period. The formation of these sedimentary basins will be the result caused by the formation of uplifted zones in the ocean side of these coastal plains since late Miocene, consequently those uplifted zones would have dammed up the sediments thereafter deposited inside. The depth of the basement of the Pliocene series corresponds to the sea-level in the late Miocene, and the formation of this sedimentary basin should not have been done by the subsidence of the earth's crust, but can be the result by the rising of the sea-level. In the case of the central part of the sedimentary basin of coastal plains located far distance from the coastal line, the river valley in the Wurm glacial age, which developed across the uplifted zones in the ocean side of the coastal plains, have been remained as the bays, on the contrary, when the central part of the sedimentary basin is situated near by the coastal line, the river valleys formed in the coastal plains have been buried, therefore linear coastal lines can be formed.
日本地質学会の論文
1972-12-25