::GEOLOGY::

The rainforest landscape has been geologically stable through out. Thus without any major geophysical upheaval, the forest has evolved relatively uninterrupted since primordial times.

The geology is sedimentary rocks, mainly sandstone and shale, with some scattered limestone outcrops and caves. Steeply tilted and folded sandstone outcrops are expose along the Sungei Tembeling, especially at Kuala Tahan and Kuala Keniam. Limestone outcrops are found at scattered locations, the highest of which is Gua Peningat (723m).