The main sedimentary system includes fluvial, delta, alluvial fan and lake facies.
主要沉积体系为河流、 三角洲、 冲积扇及滨浅湖相。
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The major sedimentary facies were alluvial fanfacies and fandeltafacies in the west, and stream delta and braided delta in the east, with a lacustrine facies in the centre of the fault basin.
The Palaeogene system in the southern west sag of the Dongpu depression consists of rift lacustrine deposits, and is developed with fluvial, delta, alluvial, fandelta and lacustrine facies.