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本文依据三江盆地西部４口井的藻类分布特征，自下而上划分９个组合，并对各组合的时代及沉积环境进行了探讨。
Based on the distribution characteristics of algae in four wells in the western part of the Sanjiang basin, nine combinations were divided from bottom to top, and the age and sedimentary environment of each combination were discussed.