Split and cracked blocks and slabs - Landforms and Geology of Granite Terrains - page 271

Figure 11.16. Plan of slope of Little Wudinna Hill ( Fig. 11.15a) , showing slipped triangular slab (T), A-tent

(X) and laterally displaced slab (Y).

(a)

Figure 11.17. Slipped slabs (a) Wudinna Hill, northwestern Eyre Peninsula, South Australia.

Eyre Peninsula, South Australia ( Fig. 11.19), and on a low hill just north of Payne's Find, Western
Australia. In part, such chaos may be due to the collapse of A-tents, but this does not afford a com-
plete explanation, and recourse needs be made to shaking, disruption and displacement of pre-
existing shells of rock.

11.3.5 Wedges
Wedges of triangular cross-section are fairly commonly developed at the exposed lower edges of
sheet structure. Wedges are not, of course, slabs, but it is convenient to discuss them here together
with other members of this suite of dislocated forms.
Several wedges have been displaced laterally (Fig. 2.9d) though some remain in situ ( Fig. 11.20).
Dislocation and friction have caused wedges of triangular cross section, and typically a few metres
long, to break away from the lower exposed faces of sheeting slabs. Some remain in situ , but many