The Hohhot-Baotou basin was developed on the basis of Paleocene sedimentary basin, and in Pliocene large scale subsidence commenced which built the fundation of huge sedimentary strata.

• 呼--包盆地是在古近纪沉降盆地的基础上发育起来的，从上新世开始发生大规模剧烈沉降，从而奠定了现代巨厚层现代堆积层的基础。