Each type of jadeite jade has its different weathered crust.

其在皮壳上均有不同表现.

Weathered crust and sedimentary intercalation are indicative of volcanic intervals. Extrusive and volcanogenitic sedimentary facies are the end-members of an eruption cycle.

风化壳层之上和沉积夹层之上的火山岩是新的喷发旋回的开始，而火山沉积相和侵出相的出现往往标志着一个火山喷发旋回的结束。