Late Pleistocene の海面変化に関する諸問題

概要

論文の詳細を見る
In this article, the author summarized the studies on late Pleistocene sea-1evel, which have been discussed for the recent 10 years. The glacial eustatic theory has been developed on the assumption that the contemporary ancient shorelines can be correlated by means of coordination of the respectlve altitudes. As an inevitable sensequence of logic, the classicical glacial eustaticians had to recognize the gradual lowering of the high standlines of interglacial sea-1evels throughout the Pleistecene. The recent glacial hydrologic studies suggested another assumption that interglacial high sea-1evels had never risen more than a few tens meters. The marine terraces and deposits in the coasts of Florida. Morocco and Madagascar should be noted as instances supporting this theory. In 1960' s, a number of the radiometric absolute dates of marine- deposits were determined in so many coasts in the world as to reconstruct the eustatic change of late Pleistocene sea-level. The author arranged the radiometric absolute dates from coastal marine deposits and the concerning shorelines to draw the curve of the fluctuation of sea-level in the last 200 OOO years(Fig. 3). The estimates of the maximum hights of sea-levels are based mainly, on the mean altitudes of the contemporary shorelines. The curve of Fig. 3 is coordinated with the change of climate. This curve will be very suggestive for the study on coastal morphology.
地理科学学会の論文
1970-12-14