Discovery of Jurassic Strata in Luobubo area, Xinjiang and Its Geological Significance

The Jurassic strata were discovered in the Luobubo area,Xinjiang. The strata are comprised of mudstones,siltstones,sandstones,conglomerates and interbedded coal beds. Abundant and well-preserved silicified wood (Coniferae sp.,Cupressinoxycnn sp.)was found in the Qiakemake formation mudstones and siltstones of upper Jurassic secession,and two coal beds (0.3m and 0.4m thick) occur in the Sukang (Qiakemake) formation. The Jurassic strata has been the first time found in the northestern Aman Depression of the Tarim basin. Therefore,this discovery is significancant for Jurassic stratigraphical study and oil and gas development in the Tarim basin.