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Lava lamp tectonics: Research suggests giant blobs of subducted sediment float up through deep Earth
lava lamp structure subduction sediment earthcrust
2021/8/6
Sand and mud subducted off the coast of California around 75 million years ago returned to the Earth's crust by rising up through the mantle as enormous diapirs, like blobs in a lava lamp, new researc...
板块构造学说为解释地表观测到的几乎全部地质现象提供了动力学机制，如，板块相对运动机制，远离彼此的大陆板块上相似古生物地理分区的形成，以及大陆穿过不同特定古气候带的原因等等。这些运动通过地幔下降和上涌分别对应的板块俯冲和海底扩张实现。板块运动本质上是地幔对流造成的。