folding occurs when - plates collide , anticline - the arch of the fold , syncline - the low part of the fold, caledonian - the oldest fold mountains , armonican fold mountians - the middle aged fold mountians, alpine fold mountians - the youngest fold mountians , how old are caledonians - 400 million years old, how old are armonicans - 250 million years old, how old are alpine mountians - 50 million years old, places to find caledonians - galway, where to find armonican mountains - france, where to find alpine mountains - the alps in Europe , social impacts of fold mountians - clean air,isolation of ppl on mountians, environmental impacts of fold mountians - pollution,more tourists , economic impacts of fold mountians - more fertile land/farmland,

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