最近30从www.hoelymoley.com 2023 - 07 - 07 - t17:15:35z //www.hoelymoley.com/feeds/question/13974 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/13974 8 user12767 //www.hoelymoley.com/users/12767 2018 - 04 - 24 - t03:41:51z 2018 - 04 - 24 - t14:15:56z

< p >如何科学家们知道最早的大洲是坐落在哪里?据说,泛大陆已经形成,生成,周围移动,等。< / p > < p >做paleogeologists主要依赖于古地磁学,古生物学,还是别的什么? < / p >

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< p >真正最早的大洲,答案是不。当你更进一步的不确定性越来越大。推测,周围已经有4 - 5超级大陆泛大陆。泛大陆有Rodinia之前,但在此之前它被越来越多的粗略的。< / p > < p >最古老的海底仅仅是侏罗纪。所以海洋古地磁学只是好回到侏罗纪,但可以推断有点除此之外。大陆磁性,这有助于把palaeo-latitude——例如,我们知道英国在早古生代赤道以南。不给你相对位置不过是一个重要的一块拼图。< / p > < p >其他地层学。是的,包括古生物学,但是在古生代之前,古生物学是有限的(如。埃迪卡拉动物有全球或地区分布吗?早期的单细胞生物呢?)。 It can also include rock correlations, isotope signatures, etc. For example, the Lewisian Gneiss is a piece of Archaeon craton in NW Scotland that has some well studied dyke sequences. If you find similar gneisses elsewhere with the same dates and dykes with the same chemical signatures, then you can hypothesise they were a part of the same unit and they split after the dyke intrusion.

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