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环状的太平洋暗示着它与地球上别的狭窄的扩张分裂型大洋有不同的成因和演化历史.太平洋是由于一次巨大规模的撞击事件撞破岩石圈后、上部塑性地幔的玄武岩浆从坑底溢出而形成的.从洋底分布的玄武岩年龄上限和滨太平洋地区的构造热历史研究表明了这一灾难性事件发生在二叠纪与三叠纪之间.这一撞击事件形成了具明显微量元素异常的P—T界线粘土层,并与地史上最大的一次生物绝灭(约96%以上生物种灭亡),以及地磁场的重大倒转,古气温和大气成份的突然性变化,地球的剧烈性膨胀,海水的大规模损失,地球自转速度加快等一系列突然事件相重合.
The ring-shaped Pacific suggests that it has a different genesis and evolutionary history than any other narrowly divergent ocean of oceans on the Pacific Ocean, where the basaltic magma in the upper plastic mantle migrated from the bottom of the pit after a massive crash hit the lithosphere Spillover from the bottom of the basaltic distribution of age and upper limit of the Pacific tectonic thermal history shows that this catastrophic event occurred in the Permian and Triassic between the impact of the incident formed a significant trace amount Elemental anomaly of P-T boundary clay layer, and the history of the world’s largest biological extinction (about 96% of the species died), as well as the major reversal of the geomagnetic field, the ancient atmosphere of the sudden changes in atmospheric composition, the Earth’s dramatic Sexual expansion, large-scale loss of sea water, the Earth’s rotation speed and a series of sudden events coincide.