448 w. m. davis observations in south africa 



Explanation of Plates 



Plate 47. — Gorge of Buffels River and Base of Witteberg Range 



Figure 1. — Entrance to the gorge of Buffels river, south of Laingsburg, looking 

 south. 

 The Witteberg series is here bent into an unsymmetrical anti- 

 cline, the axis of which crosses the river near its farthest 

 point here shown; the strata on the farther side dip gently 

 southward; those on the nearer side are about vertical. 

 Greatly distorted strata were seen on the left wall of the 

 notch, just below the entrance (see page 390). 



Figure 2. — Northern base of the Witteberg range, just above the gorge of 

 Buffels river, looking southeast. 

 The weaker upper members of the Witteberg series here form 

 foothills. The Dwyka tillite forms a ridge on the left, not 

 shown in this view (see page 391). 



Plate 48. — Deformed Witteberg Series and cobble-covered Terrace 



Figure 1. — Greatly deformed Witteberg series, on east wall of lower gorge of 

 Buffels river, south of Laingsburg. 

 This view, which is looking nortbeast, occupies the central part 

 of figure 5 (see page 392). 



Figure 2.— Cobble-covered terrace or planation surface, southwest of Laings- 

 burg, looking south. 

 This shows the Witteberg range in the background. The val- 

 leys of Buffels river and its tributaries are now from 300 to 

 500 feet below this terrace (see page 397). 



Plate 49. — Table Mountain Sandstone and Matopos 



Figure 1. — Table Mountain sandstone in the southern part of Cedarbergen 

 range. 

 The view looks east from the upper valley of Berg river. The 

 valley is worn down on the weak axial beds of a north-south 

 anticline (see page 395). 



Figure 2. — Group of Matopos, southwest of Bulawayo. 



This is a disintegrating granite knob, surmounting a widespread 

 plain of erosion (see page 429). 



