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为什么超级大陆形式?(复制)

从表面上看,它似乎不可能大陆陆地会积累到一个复合,但它已经发生多次,预计将来。

一定会被板块构造的某些方面支持这些安排。

谁能提供一个解释吗?

编辑:这是不,在我看来,一个复制的超大陆周期的原因是什么?”的问题。这个问题是过程驱动形成任何和所有的超大陆的形成,我认为应该不可能,更不可能复发,与其说周期本身。另一个问题没有解决这个更根本的方面,或在任何情况下接受相关账户的决议。如果有人想参与,或看不出什么区别,请在评论中这样做或聊天。

回答

只是重申一些点之前说:1。大陆地壳碎片粘相撞。这导致山带,基本上两个外壳“粘”在一起。2。俯冲板块的同时包含海洋和大陆壳下面大陆地壳将不可避免地导致海洋地壳的完全丧失,和大陆地壳的粘到另一个。印度和喜马拉雅山这样的一个例子与所有海洋地壳地幔,和地中海的一个例子是一个几乎完全俯冲洋壳(又名特提斯海),与山带的形成(阿尔卑斯山脉),很快就有两个大陆壳粘在一起(欧洲和非洲)。>,它也可以包含大陆地壳俯冲远离相邻板也“走”一个球体意味着“对”在另一个方向。这都是相对而言的。>或至少降低所有大陆地壳的概率>退火一次他们不需要退火。他们只需要退火时间不够长,没有断裂,所以最终在一个地方。 > is how all these pieces land together again & again so improbably > frequently Improbably frequently? The last one existed about 300 million years ago, and the next one will form only in about 200 millions (more or less, depending who you're asking). In geological history, there are only two confirmed supercontinents, Pangea and Rodinia. Anything earlier than that is pure speculation (although educated speculation). I wouldn't call "twice" in 4.5 billion years "frequent". ---------- I can also demonstrate by example. Today, there is only one rift that is properly breaking up a continent. This is the East African rift, and the Red Sea is a nascent ocean that is spreading now. But, there are more than one collision zones. The Australian plate is moving northwards, and soon will stick to SE Asia. India is already stuck there. Asian plate is stuck to European plate (Urals in Russia are the suture zone). Arabian plate and African plate are moving northwards as well (Alps, Zagros, all those mountain belts are the suture zones). The Pacific ocean used to be a whole lot bigger (Panthalassa Ocean). One oceanic plate is already underneath North America. The subduction rate of the Pacific Plate is the fastest of all subduction zones, and in not too long ago America (particularly North) will stick to Asia. The Atlantic Ocean has no subduction zones, so it will grow to become the new Panthalassa Ocean, with most other continents forming one single supercontinent. ---------- > the break-up is of no particular relevance, and seems to be straight-forward - plate movement under the cratons Actually no. The "cratons" are already a single plate, glued together from several other plates. The break-up usually occurs because of > build-up of mantle heat under the insulating continental lid, will ultimately cause rifts to begin and start to form young oceanic crust (Arkenstein XII from the comments).

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