On the Devonian sequence stratigraphy of the north-west margin of the Yangtze platform in China

The strata of Devonian in the north-west border of Wengxian country of yangtze region was explored by the authors during the surveying of the 1:5000 Buziba sheet and Lingjiang sheet.The results of reseach show that it may be divided in to four three-order sequences.And each sequence exists TST and HST.The first three-sequence didn't find LST and SMST.The last one has SMST.After sedimentary sequences contrast of the region, the stratigraphic framework of Devonian was bas built and analycised at north-west border in yangtze region.