关于第三类型过渡带除通常划分的两种不同类型的过渡带(大西洋型或被动型,太平洋型或主动型)外,作者认为还可以划分出第三种类型过渡带,称之为哥伦比亚型过渡带。哥伦比亚型过渡带沿北美太平洋边缘发育,位于加里福尼亚和阿拉斯加之间。根据构造特征,它是中间类型的过渡带。沿大陆边缘延伸的这个年轻的褶皱带和山链同太平洋型过渡带的边缘相 With regard to the third type of transitional zone, in addition to the two types of transitional zones (Atlantic or passive, Pacific or active) generally divided, the authors consider that a third type of transitional zone can also be delineated, referred to as Colombian Transition zone. The Colombian transition zone develops along the North American Pacific rim between California and Alaska. According to the tectonic features, it is an intermediate type of transition zone. The young fold belt and mountain chain that extend along the continental margin are similar to those of the Pacific transitional belt