system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR Movies] If the Stone Giants have been fighting regularly for ages, why haven't the mountains been ground to dust?
gpt
They don't appear in the stories men tell until the third age nor get a mention in the tale of creation, given dwarves lived in the mountains before the third age it's reasonable to assume the giants moved there around the time Sauron was defeated.  

Fact is 3000ish years of throwing rocks of similar hardness at each other just isn't enough to destroy a mountain range.