PALYNOLOGICAL IMPLICATIONS FOR RELATIONSHIP BETWEEN ARIDIFICATION AND MONSOON CLIMATE IN THE TERTIARY OF NW CHINA
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Abstract:
Based on palynological data,we suggest that the retreat of the Tethys and Parat ethys from southern and Central Asia in Eocene and the uplift of Qinghai-Xizang Plateau in Miocene have largely shielded the monsoon climate northwestward,and have resulted in the Tertiary aridification in NW China.With the persisting upl ift of Qinghai-Xizang Plateau and the strengthening of winter monsoon(cold sna p)in the Pliocene,the climate in these regions tended to become much drier and the component for vegetations was r...