地壳为什么会动?这一地学领域中的基本理论问题一直成为地学工作者探讨、研宄的中心,本文作者对此提出了新观点—“密度平衡椭球体”假说。根据这一新观点,作者对喜马拉雅山的形成,圣安德列斯断层、地槽、深海沟、山字型构造的形成等一系列重要地质问题提出了新看法。 Why does the earth’s crust move? The basic theoretical issues in the field of geosciences have always been the center of geoscientists’ exploration and research. The author of this article puts forward a new view - the “density-balanced ellipsoid” hypothesis. According to this new viewpoint, the authors put forward new ideas on a series of important geological issues such as the formation of the Himalayas, the San Andres Faults, the troughs, deep trenches and the formation of mountain-shaped structures.