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SEA LEVEL CHANGES OF THE BOHAI SEA REGION SINCE 200,000 YS |
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Based on our systematic study for marine formation of the eastern coastal region in China, 3 marine formations, had discovered since 100,000 years, 7 marine formations in the central region of Bohai sea had found during the last 200,000 years. Authors consider that marine facies deposit should correspond to interglacial or interstadial sediments, continent deposit should correspond with glacial sediment or sub-glacial one. So alternative occurrance of the marine formation and the continent one in Quaternary sediment were reliable record of transgression and regression, strong evidence of sea level change in the world too. We insist that glacial and postglacial isostatic adjustments could not explain the history of advancement and recession of the shelf sea in China, but could give a clear explanation for the process of transgression and regression since middle Pleistocene and for the history of sea level change during the last 200,000 years if alternative occurrance of glacial climate and in-terglacial one cooperate with connected emergence or submergence in that place. |
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