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作用活动大陆边缘滨海-浅海环境。经过太古域高角闪相质作用，形成孔。