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来源：雅诚德英语网
First identified in 1969, komatiites are Earth's oldest known volcanic rocks and contain three times as much magnesium as do most volcanic rocks.
科马提岩于1969年首次被发现，它是地球上已知的最古老的火山岩，含镁量是大多数火山岩的三倍。
First identified in 1969, komatiites are Earth's oldest known volcanic rocks and contain three times as much magnesium as do most volcanic rocks.
科马提岩于1969年首次被发现，它是地球上已知的最古老的火山岩，含镁量是大多数火山岩的三倍。