包卷构造 meaning in Chinese

roll-up structure

( 3 ) the forming wrapping structure because of interlayer between silt and clay at the transition part from the fourth layer to the fifth layer in the sediments section . according to this , intense change of the geoenvironment in this area at the period of filling up of the ancient barrier lake is presumed
( 3 )通过在沉积物剖面的第四层到第五层过渡的部位可以看到粉砂土层和粘土土层相互渗透而形成的包卷构造，推测古堰塞湖淤积时期内该区域的地质环境发生了重大改变。