Abstract:During the late Late Triassic to middle Jurassic there occurred two times of a large number of slump,sedimentation of mudflow, and sliding event of huge blocks in western Liaoning province and northern Hebei province of Yanshan intraplate orogen in China. The Late Triassic to Early Jurassic Dengzhangzi formation is a sedimentary sequence of sliding, mudflow, slumping, deepwater turbdite mainly composed of carbonatite conglomerates. The ages of gravels of conglomerates in Dengzhangzi formation become elder from bottom to top. The newest gravels are andesites from the Late Triassic Shuiquangou formation under the Dengzhangzi formation. The upside sequences of the gravels in their ages shows the syn-tectonic erosion or uproofing and sedimentation and the sedimentary facies of Dengzhangzi formation show the sedimentary features of an extensional basin. We also find there are many huge sliding blocks formed after the sedimentation of Dengzhangzi formation, the largest one of the blocks is exceeded 4 km in length, in the other areas of northern Hebei province and western Liaoning province. Generally, the sliding, slumping, mudflow, and a group of huge sliding blocks are the sedimentary records in the rapid uplifting of crust. So occurrence of the sedimentary events shows, in tectono-sedimentation, that the Yanshan area ware rapidly uplifted in the early Jurassic.