Meaning of garge in geography ?

There is no specific term "garge" in geography. It is possible that there may be a typo or misspelling in the term you are referring to. If you can provide more context or clarify the term, I may be able to help you further.

A gorge is a deep, narrow valley with steep sides, often formed by the erosive action of a river or stream. It is typically wider at the top and narrower at the bottom, and may have a steep, vertical headwall at its upper end. Gorges are often found in mountainous or hilly terrain, and can be a popular destination for hikers, climbers, and other outdoor enthusiasts.