SPORE-POLLEN ASSEMBLAGE AND ENVIRONMENTAL CHANGES OF THE CHENGDU PLAIN DURING THE LATE HOLOCENE
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Abstract:
On the Chengdu Plain,a four-meter thick sedimentary succession has accumulated during the past 4 000a of Holocene.In this study,82 samples were collected at 5cm intervals.Based on the characteristics of spore-pollen and 6 datasets from 14 C analysis,the vegetation-climatic changes on the Chengdu Plain during the last 4 000a are discussed.Five phases of paleovegetation successions and climatic fluctuations are revealed for the past 4 000 years,and five climate periods can be recognized and correlated regionally and globally.The results of this study suggest that the climate on Chengdu Plain has been affected by global climate to a certain degree.