Chief factor in location is pre-existent trough filled with lighter erosion materials. [1] Faith removes. [2] Formed by upheaval at end of continental drift. [3] Locations of oldest. [4] Modern mountains built in Cretaceous. [5] Named. No rugged ranges on Jerusem or Edentia. [6] Result of rain, gravity, and erosion. [7] Worship of hills. [8]