stratums造句

Emergence stratums are of Sinian, Devonian, permian, Trias and intrusive granite dike and coarse - grained granite dike.

It is one of the stratums which are lower degree of exploration and research in the Qaidam basin.

The model stratums mainly included miscellaneous filling soil surface, interaction stratum of silty clay, silt and fine sand and pebble round gravel at the bottom of station tunnel.