早奥陶世马家沟期，在鄂尔多斯东部的陕北地区沉积了近千米厚的碳酸盐岩-蒸发岩地层。
During the Early Ordovician, a suit of carbonate-evaporites had deposited in the east part of the Ordos, which is now known as the Majiagou Formation and up to approximately 1000 meters in thickness.
其可溶抽提物中的生物标志化合物分布特征与碳酸盐岩和蒸发岩系很相似。
The distributive characteristics of biomarkers in their soluble extracts are very similar to those in carbonate rocks and evaporite rocks series'.
接受碳酸盐岩沉积时气候相对干热，湖泊水文状况趋于封闭，火山活动频繁，古湖泊水体补给量小于蒸发量。
When the carbonate deposited, the climate was relatively dry and hot, the lake hydrology tended to close, volcanic activities were frequent and the lacustrine water supply was less than evaporation.
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