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(c)
Figure 11.13.
(c) One formed in early 1995 on a bedrock surface from which about a metre of regolith had
recently been stripped.
Figure 11.14.
Overlapping slab, Wudinna Hill, northwestern Eyre Peninsula, South Australia.
inclination and roughness of the surfaces in contact is crucial, but in a material like granite is of the
order of 30°. Thus, at Pildappa Rock, northwestern Eyre Peninsula, there are large, sub-angular
joint blocks, more than one metre diameter, standing on slopes of 24° and 26° (Fig. 11.18).
Though the slopes on which they rest are steeper than those down which the triangular slab at
 
 
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