请问Northeast Fork of the Kahiltna中的fork何解

formalin14

http://www.climbing.com/news/hotflashes/climbers_lost_near_end_of_huge_alaskan_traverse/

这篇文章里出现很多。

比如：
it’s unlikely they diverted to the head of the Northeast Fork of the Kahiltna
near the mouth of the Northeast Fork
the saddle between the east and northeast forks of the Kahiltna Glacier

不知道这个fork做何解？岔口？区域？还是什么？

mh

分岔、分支。一般指道路河流，用于冰川（Kahiltna）甚至山脉山脊都可能

formalin14

多谢解答