Zonality, azonality, and the coastal context - Landforms and Geology of Granite Terrains - page 300

Figure 12.6. All slopes topography in argillites, Pertnjara Hills, southwest of Alice Springs, Northern

Te r ritory (Wahrhaftig, 1965).

(a)

Figure 12.7. Corestone boulders (a) in basalt, southern Drakensberg, Cape Province, South Africa.

Victoria (Spencer-Jones, 1965), and, albeit poorly developed, in dacite in the southern Gawler Ranges.
But they occur in abundance in a rhyolitic tuff in the City of Rocks, Grant County, southern
New Mexico. Here the walls of the fracture-defined corridors (or streets) are all to a greater or lesser
degree flared; and the subsurface origin of the forms is demonstrated in several minor excavations
due to accelerated soil erosion in the floors of the corridors ( Figs 12.9c and d).
Several other minor forms typical of granite are developed in sandstone. Huge rock basins
and doughnuts occur in the Colorado Plateau, in the Utah-Arizona border region (Bradley, 1963;
Netoff, Cooper and Shroba, 1995 and see Figs 12.11a and b). They are also developed in arenaceous