Geology Reference
In-Depth Information
(c)
Figure 12.2.
(c) Inselberg of Cerro de Moraján, Toledo, central Spain developed on Ordovician quartzite
standing in Precambrian schist.
(a)
Figure 12.3.
(a) Ayers Rock, a bevelled bornhardt developed in arkosic sandstone, in central Australia.
Stratigraphic evidence points to the upper surface being of etch origin and of later Cretaceous
age. (S.A. Tourist Bureau).
particular compartments and the development of the sheeting due to kinks, or locally developed
tight folds, and hence to compressed sections, in the metamorphic sequence.
Nubbins are well-developed in granite and also in amphibolite, dolerite and norite (Hutton,
Lindsay and Twidale, 1977) where they are related to orthogonal fracture systems. They are also
