Isotopic dating and regionalstratigraphiccorrelation indicate that the Xigeda Formation is Pliocene-Early Pleistocene sediment.
结合同位素地质年龄，区域对比分析，确认昔格达组属上新世至早更新世沉积。
2
In the regionalstratigraphic classification and correlation, the Lower Tertiary strata are absent in Guyang basin, Inner Mongolia.
在区域地层划分与对比中，内蒙古固阳盆地缺少下第三系。
3
The discovery of these large vertebrate fossils has great significance for the redefinition of the stratigraphic age and regionalstratigraphic division and correlation of the area.