permanent 和 disappear 的矛盾问题

Finally you climb into an arctic-like zone with permanentsnow and the glaciers that may soon disappear.

老师，这里的permanent 和disappear 不是矛盾吗？ 还是雪和冰川是分开描写的?

with permanentsnow and the glaciers是介词短语作定语修饰an arctic-like zone，指像北极一样的拥有终年积雪和冰川的地带；而permanentsnow and the glaciers又被定语从句that may soon disappear修饰，指“终年积雪和冰川”或许不久便会消失。