Sequence stratigraphy of the Permian strata in the Simao Basin, Yunnan

The Permian strata in the Simao Basin, Yunnan may be divided, on the basis of sequence boundaries and condensed horizons in combination with the field observations along the ZhendongDehua sections, into two secondorder sequences and nine thirdorder sequenes including three Lower Permian sequences and six Upper Permian sequences. These sequences may be well compared both throughout the basin and even southern China, implying that a correlation can also be made in eustatic fluctuations, tectonism and sedimentary evolution in southern China.