The early Proterozoic atmosphere and hydrosphere are similar to those of Archaeozoic in being still absent in oxygen.
早元古代的大气圈、水圈与晚太古代相似，仍为缺氧性质。
The early Proterozoic metamorphic crystalline basement and the late stable platform covers are exposed in the Yili-central Tisnshan region.
伊犁中天山区出露早元古代变质结晶基底及晚期地台型稳定盖层。
One of the important features of the Early Proterozoic Liaojitite Suite in Liao-dong Peninsula is the widespread nappe tectonics, one of which is the Qingchengzi nappe.
广泛发育的推覆构造是辽东早元古宙辽吉岩套的重要特征之一。
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