大陆地形相对于海拔或高程的分布,具有清晰的模式,这在对比约1000米上下的累计等高线的坡度时是明显的(图1)。等高线陡倾的上部的形状和高度,大致是狭窄造山带内大幅度垂直运动造成的;而平缓的坡度则反映着广大地台区的小幅度垂直运动或造陆运动。由于地台区和造山区的地区均随时间而变化,因此任何大陆的等高线在地质历史上都不可能与现代大陆的等高线相似,尽管这个时期的大陆 The distribution of the continental topography relative to altitude or elevation has a clear pattern, which is evident when comparing the slope of the cumulative contour above and below about 1000 meters (Figure 1). The shape and height of the steep upper part of the contour line are generally caused by the drastic vertical movement in the narrow orogenic belt. The gentle slope reflects the small vertical movement or land-building movement of the broad platform area. Since the terraces and the orogenic regions vary over time, contours of any continent may not resemble the contours of the modern continent in geologic history, although the continents of this period