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.

原形有基性火山作用的活动大陆边缘海-浅海环境。经过太古宙的区域高相变质作用，形孔兹系。