自本世纪70年代至80年代,人们逐渐明白了这样一个地质事实,即北美大陆科迪勒拉山系是由地体以断层为界的、地质特征完全不同的不规则的集合体所组成。据此,对其它造山带又重新进行研究,发现环太平洋大陆边缘造山带大体上也具有和北美西海岸同样的特征。本文主要以北美为例,论述自地体概念出现以来的各种论点以及对造山带研究的最新动态。 From the 1970s to the 1980s, people gradually came to understand the geological fact that the Cordillera Mountains of the North American continent are composed of irregular assemblages whose bodies are fault-bounded and have completely different geological features. Based on this, the other orogenic belts are re-studied and found that the marginal orogenic belt of the Pacific Rim generally has the same features as the west coast of North America. This paper, taking North America as an example, discusses the various arguments since the emergence of the concept of soils and the latest research on the orogenic belt.