Environmental Engineering Reference
In-Depth Information
Figure 2.25.
Type of valley weathered profile where a river has cut down through an uplifted block
which has been deeply weathered previously.
Figure 2.26.
Cross section at Yellow Pinch Dam, New South Wales, showing buried land surface with
weathered zone.
situation at Yellow Pinch dam in New South Wales. The valley walls at this site are formed
by a near-horizontal sequence of mainly conglomerates and sandstones, of Permian age.
These rocks are slightly weathered. However, at and just below river level, they uncon-
formably overlie granodiorite of Devonian age. The granodiorite is moderately to highly
