Silurian in Tarim Basin, bounded at the top and base by widely spread regional unconformities, can be divided into 1 second-order sequence and 5 third-order sequences.

• 摘要塔里木盆地志留系是由角度不整合面所限定的一个区域性（二级）的沉积层序，其内可划分出5个三级沉积层序。