Abstract This paper probes into the depostitional environments and precipitation facies and engineering geological characters of the peat soils in YunNan Plateau. The results show that the peat soils in YunNan Plateau deposited mainly in bad-drained structural basin by lake and marsh from time of later Pleistocene Epoch. Compare with soft clay soils,the microgeo- logical characters and the engineering geological characters are very bad, the peat soils are very soft soils.
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Received: 18 May 1996
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