论文部分内容阅读
大家知道,陆地面占地球总表面的三分之一略多一点(包括大陆架——沿海浅滩),其余则是海洋。在长期的风雨侵蚀下,地壳的岩层逐渐被冲入江河:一部分沉积在大陆架,一部分被带入海洋。乍看起来,大陆只有如此一年年“瘦”下去。然而事实正好相反。地球上的陆地面积不仅没有减少,而且在不断增加。使地球大陆不断“发胖”的物质,来源于地下的岩浆活动“。
As you know, the land surface accounts for slightly more than one third of the total surface of the Earth (including the continental shelf - coastal shoal) and the rest is the ocean. Under protracted weathering and erosion, crustal rock formations are gradually washed into the river: one part is deposited on the continental shelf and one part is taken to the sea. At first glance, the mainland only has such a year ”thin“ down. However, the opposite is true. The land area on Earth has not diminished but is growing. Make the Earth’s continent continuously ”fat “ material, derived from the magma underground ”.