Its original rock is sedimented in the environment of active epicontinent-seaboard with basic volcanism, and become khondalite series through the Archean regional high-amphibolite facies metamorphism.
岩形
于具有基性火山作用的活动大陆边缘滨海-
海环境。经过太古宙的区域高角闪岩相变质作用,形
岩系。