the middle-late proterozoic metamorphic crystalline basement and the postearly sinian stable covers are exposed in the north of the tarim region.
塔里木区北部出露中晚元古代「优地槽建造」的变质结晶基底和早震旦世后稳定盖层。
the meso-cenozoic detachment zones in the front of the taihang mountains occur between the early precambrian metamorphic crystalline basement and post-mesoproterozoic sedimentary cover.