1·The thickness of sedimentary cover is rather huge;
沉积盖层厚度大、地块表层强度低；
2·Shiwanshan basin has a Mesozoic to Cenozoic continental sedimentary cover lies over a basement of marine-facies Indosinian deformation.
十万山盆地是在印支期海相沉积基底上发育的中新生界陆相沉积盆地。
3·Therefore, the extensional movement is also one of the mechanisms for controlling formation of the unifying metamorphic basement and sedimentary cover.
由此可以认为伸展构造亦是控制统一变质基底与沉积盖层的形成机制之一。