In spite of the importance of the constructive forces which are still building up the mountains, much of the finest scenery of the cordillera is due to the destructive forces of erosion.
(the constructive forces; are building up; the mountains; T:still) (much of the finest scenery of the cordillera; is; due to the destructive forces of erosion)
the constructive forces much of the finest scenery of the cordillera
are building up is
the mountains T:still
due to the destructive forces of erosion