4.It comprises blocks of crystalline basement (Archean to Lower Proterozoic) with folded metamorphic basement (Middle to Upper Proterozoic), Palaeozic volcano sedimentary rocks, and a Mesozoic to Cenozoic cover.
9.The crustal components in the region include: late Archean crystallization basement, middle-late Proterozoic fold series and Paleozoic cover of upper Sinian to Permian stratigraphic system.
10.The moduluses of sediments are 100～1000t/km~2. a when vegetation cover rate reaches above 80％ in the watershed. The vegetation cover rate is 2.6 % in the upper reachs of Luo River, the modulus of river sediments is above 10 000t/km~2. a.
