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| THE SPORE-POLLEN ASSEMBLAGES AND THE STRATIGRAPHY AND PALAEOGEOGRAPHY IN WESTERN BOHAI SEA SINCE LATE PLEISTOCENE |
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| Through the study of spore-pollen and algae from three column sections, the evolution of vegetation and the variation of climate in western Bohai Sea and its coastal regions are divided into seven stages. The first four stages belong to the late Pleistocene, the rest three stages to the Holocene. At the late Pleistocene, western Bohai Sea has gone through land and sea, and vice versa. At the Dali Warm Glacial Epoch, the sea level lowered greatly because of the bitter climate, making most of the western Bohai Sea twice land areas. The present geomorphologic outline began to take shape with the rise of the sea level in Holocene. |
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