The researchers studied the sedimentary facies of lower Cretaceous rocks in the Sangequan area of the Junggar Basin. They used data from core samples, seismic studies, and other sources to understand how the environment changed over time. They found that the area experienced uplift and shifting lake levels, leading to the formation of braided river channels and delta deposits. The sedimentation patterns suggest a hot and dry climate with recurrent deposition of sand. As time progressed, the environment shifted to shallow lakes and beach deposits. The findings show how the landscape evolved during the early Cretaceous period in this region.