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海洋是古老的(约36亿年前),但目前板块论者认为洋壳是年轻的.按一般推理,所谓海洋应先形成海盆.而后逐渐盛满海水,所以洋底的年龄应老于海水.但根据六十年代以来海洋地质调查工作所获的大量资料说明,世界各大洋的洋壳年龄均较大洋年轻得多,从目前深海钻探所采获的岩芯,经同位素测年的结果发现其年龄值均小于1.6亿年.1980年《格洛玛·挑战者》号深海钻探船,在西南太平洋瑙鲁海盆钻一深孔,经研究发现其洋壳时代相当于中侏罗世(1.7亿年±),这是迄今在太平洋获得的最老洋壳的年龄数据.
The oceans are ancient (about 3.6 billion years ago), but the current panelists believe the oceans are young. According to the general reasoning, the so-called oceans should first form a sea basin, and then gradually filled with seawater, so the age of the ocean floor should be older than seawater However, according to the large amount of data obtained from the marine geological survey since the 1960s, the oceanic crust ages of all oceans in the world are much younger than that of the oceans. According to the isotope dating of the cores collected from deep-sea drilling at present, With an age of less than 160 million years.The deep-sea drilling vessel Grove Challenger of 1980 drilled a deep hole in the Nauru basin of the Southwest Pacific and found that the oceanic crust was equivalent to Middle Jurassic (1.7 Billion Years ±), which is the age data of the oldest oceanic crust ever obtained in the Pacific Ocean.