Ordovician period

The soluble rocks in this area are the carbonate rock constructions of the Sinian, the Cambrian and the Ordovician period.

区内可溶岩地层为震旦纪、寒武纪及奥陶纪碳酸盐岩建造。

There was a deposit of carbonate gravity flow from Middle Cambrian Period to Lower Ordovician Period in Sandu& Danzhai area.

三（都）&丹（寨）地区在中寒武世至早奥陶世发育了一套别具特色的碳酸盐重力流沉积。

Study of the Fluctuation of Sea Level During Ordovician Period in Tarim Basin

Hypermecaspis（三叶虫）的蜕壳塔里木盆地奥陶纪海平面变化

Carbonate Gravity-Flow Sedimentation from Middle Cambrian Period to Lower Ordovician Period in Sandu-Danzhai Region

三（都）&丹（寨）地区中寒武世至早奥陶世碳酸盐重力流沉积

The palaeo-geotherm gradient is 3.2~ 3.5 ℃/ 100m in early Ordovician Period and Cambrian Period, and it decreases distinctly from then on.

早古生代塔中地区古地温梯度较高，寒武纪&早奥陶世地温梯度为3.2～3.5℃/100m，此后地温梯度显著下降；