the eastern seaboard of the United States.
美东部区。
the eastern seaboard of the United States.
美东部区。
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.
原岩形成于具有基性火山作用的活动大陆-浅环境。经过太古宙的区域高角闪岩相变质作用,形成孔兹岩系。
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