The Cretaceous in the Kuqa Depression was an arid intracontinental depression，in which only the Lower Cretaceous marked by a set of arid redbed was developed and could be divided into the Yageliemu Formation，the Shushanhe Formation，the Baxigai Formation and the Bashijiqike FormationSeveral types of sediments constitute this set of arid redbediepluvialfan conglomerates，intermittent river sandy conglomerates，aeolian sandstones and desertlake  purple mudstones These sediments of the Cretaceous in the Kuqa Depression made up a typical desert sedimentary systemThe cyclicity in stratigraphic records are reflected by the alternation between the coarse clastic pluvial sediments in the lower part and the fine desertlake sediments in the upper partAeolian sandstones were formed in the initial stage and the regressive stage of the lakeforming periodAccording to the cyclicities in the stratigraphic records represented by the sedimentary facies succession，iethe succession constituted by pluvial coarse clastic sedi ments in the lower part and fine desertlake sediments in the upper part,the Lower Cretaceous in the Kuqa Depression could be divided into five thirdorder sedime ntary sequences，ieSQ1to SQ5Because the top and bottom boundaries of the Lower Cretaceous in the Kuqa Depression are obvious tectonic unconformities，the Lower Cretaceous in the Kuqa Depression makes up a secondorder tectonic sequenceThere is regularly ver tical sacking pattern for thirdorder sedimentary sequences in the secondorder tect onic sequence This feature is reflected by that more coarse pluvial clastic sedi ments were developed in SQ1 and SQ5，and the middle part of the Lower Cretace ous in the Kuqa Depression made up by SQ2 to SQ4 was always developed with more fine d esertlake sedimentsDifferent from marine strata，the cyclicities represented  by sequence sin stratigraphic records in the Lower Cretaceous of the Kuqa Depression are mai nly caused by the episodic tectonic subsidenceDue to a high difference of toporgr aphy，more coarse clastic pluvial sediments were  formed in the initial stage of sedimentary basin subsidence，corresponding to the isostaticsubsidence stage during which the lake was formed and more fine de sertlake sediments were developedOn the basis of sequence stratigraphy，the pala eogeographical visage as well as the evolution process of sedimentary facies and palaeogeography for the Cretaceous of the Kuqa Depression are clearly reflected by a series of the panel diagram of sequence stratigraphic frameworks and their corresponding outline maps of sedimentary facies and palaeogeography