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.

原形成于具有基性火山用的活动大陆边缘海-浅海环境。经过太古宙的区域高角闪相用，形成孔兹系。