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1 深海钻探历史地球表层岩石圈经常活动 ,这种动力地球观从研究海底开始形成。海底从洋中脊喷出的岩浆诞生 ,在海沟处俯冲消亡。因此 ,约占地球表面积 70 %的海底大约两亿年进行一次更迭 ,这就是海底扩张学说。 2 0世纪 60年代初提出的这种观点 ,为地球科学的发展带来了深刻变
1 Deep-sea drilling history The Earth’s surface lithosphere is often active, and this dynamic earth concept forms from the research seafloor. The magma erupted from the mid-ocean ridge at the bottom of the ocean was born and subducted at the trench. Therefore, about 70% of the Earth’s surface area of the seabed about 200 million years to conduct a change, this is the theory of submarine expansion. This view put forward in the early 1960s has profoundly changed the development of earth science