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TheRamapo Mountains are a forestedchain of theAppalachian Mountains in northeasternNew Jersey and southeasternNew York, in theUnited States. They range in height from 900 to 1,200 feet (270 to 370 m) in New Jersey, and 900 to 1,400 feet (270 to 430 m) in New York.
Several parks and forest preserves encompass parts of the Ramapos (seePoints of interest, below), and many hiking trails are in the Ramapos, including sections of theAppalachian Trail, which is maintained and updated in the Ramapo Mountains by theNew York–New Jersey Trail Conference.
In New York, the mountains serve to divideOrange andRockland Counties. The difficulty of crossing the mountains is what caused Rockland County to break away from Orange County in 1798.
The mountains are named after theRamapo Fault, which trends northeast to southwest, and separates the easternPiedmont geologic province from the Highland province.
The Ramapos are composed ofgranite,gneiss, andmarble, as old as 1.3 billion years.
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41°10′20″N74°06′00″W / 41.1723°N 74.1001°W /41.1723; -74.1001
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