The ins and outs of a Proterozoic supercontinent - what is the significance of 990-900 Ma orogenesis for the assembly of Rodinia?

地球上所有的大陆在10亿年前聚集在一起，形成了一个被称为罗迪尼亚的超大陆，这一假说引发了关于古代大陆分布的争论。目前的模型对罗迪尼亚的构造描述是有缺陷的，因为它们假设保存了1350万到9亿年前截然不同的构造活动时期证据的大陆碎片是在同一时间发育的。该项目将基于对南极洲和墨西哥岩石的仔细观察和精确的同位素年代测定，得出新的相关性，并将利用这些数据，绘制出一幅更真实的古代地球图景。

The hypothesis that all of Earth's continents came together one billion years ago to form a supercontinent known as Rodinia has invigorated debate about ancient continental distributions. Current models depict a flawed configuration for Rodinia, since they assume that continental fragments preserving evidence for quite different episodes of tectonic activity between 1350 and 900 million years ago developed at the same time. This project will make new correlations based upon careful observation and precise isotopic dating of rocks in Antarctica and Mexico, and will use these data to develop a more realistic picture of the ancient Earth.