海洋的历史记录在沉积于海底的堆积物中。堆积物的来源主要有下列两种:一种是陆地上的原有岩石由于风化 侵蚀作用成为砂粒和粉砂粒,再经过降水 风、河流、冰川等的搬运作用,运移到海里而堆积的陆源性堆积物。另一种是在近海面的透光带生活 The history of the oceans is in sediments deposited on the sea floor. There are two main sources of sediments: one is that the original rocks on the land became sand and silt due to weathering and erosion, and then transported to the sea and accumulated by the handling of precipitation winds, rivers and glaciers, etc. Sexual deposits. The other is living in the translucent band near the sea