| Located on the divide between Coquitlam River and Pitt Lake, north of Widgeon Lake and south of the Five Fingers Group, Peneplain is notable for preserving on its upper surface a chunk of the Eocene erosional surface which predates the formation of the Coast Mountains. In Eocene times (early Tertiary), the Coast Mountains did not exist and the area today occupied by them was an essentially level surface of low relief (a peneplain). Orogenic uplift resulting from new crustal motion in the late Tertiary, followed by Pleistocene glaciation and erosion, has tended to destroy most of the original peneplain surface. Other remnant chunks can be found on Mt. Alfred, above Jervis Inlet, and on Cardtable Mountain in the Chilcotins. |
