There are four major disciplines in earth sciences, namely geography, geology, geophysics and geodesy.地球学又分为四大类, 即地理学, 地质学, 地球物理学和测地学.Physics and astronomy are cognate sciences.物理学与天文学是互有关联的科学.Most seem to come from tech...
The process of alternating solid rock masses is called metamorphism.固体岩体变换的过程即所谓变质作用.Danba area has undergone multiperiod deformation, metamorphism and magmatism since Mesozoic time.丹巴地区自中生代以来经历了多期的变形 、 变质和岩浆作用.The metal...