 The geology of Junggar Basin mainly consists of sedimentary rocks underlain by igneous and metamorphic basement rocks.The basement of the basin was largely formed during the development of the Pangea supercontinent during complex tectonic events from Precambrian to late Paleozoic time.The basin developed as a series of foreland basins – in other words, basins developing immediately in front of growing mountain ranges – from Permian time to the Quaternary period.