Along with the eroding mountains and sediment filling the seas, smaller bits of the continents - islands and archpelagos -are drawn closer to the continental edge and compressed onto its margins.

• 山上冲洗下的沉积物填充了大陆架上的浅海，为大陆增添了更多的陆地。大陆版块筑造运动在活动带移动大陆块，重复着大陆块的构成。