Often referred to as' the ocean of coal ', Shanxi is rich in coaldeposit, and coal mining is its most important industry.
山西省矿产资源十分丰富，其中以煤、铝土、铁等为最。
3
The Upper Permian System Longtan coal measure in the Changguang coaldeposit is a complete sedimentary cycle, consisting of a regressive and a transgressive series.