Geology Reference
In-Depth Information
Figure 6.20. Yarwondutta Reservoir, northwestern Eyre Peninsula, South Australia, showing concave-upward
weathering front exposed by the excavation of the water storage in 1915-16. The concrete pil-
lars originally supported a corrugated iron roof intended to reduce evaporation and contamina-
tion. Note the flared basal slope in the background.
(a)
Figure 6.21. (a) Plan of Yarwondutta Rock, northwestern Eyre Peninsula, South Australia.
- Scarp-foot weathering, the first stage in the development of another set of flared for ms, is in
progress, for a concave weathering front is exposed in an excavation.
- Remnants of landforms related to earlier phases or cycles of development have clearly persisted.
Yarwondutta Rock appears at one time to have been merely a low platform with, at most, a few
boulders or sheet remnants standing abo ve the general level. That platform is now the upper
surface. It has survived at least two subsequent phases of subsurface weathering and erosion of
the adjacent plain.
