[To face page 879. 



Fig. 1.— Section through the Lydenlurg Gold-field. (Horizontal scale 4 miles to 1 inch ; vertical scale 4000 feet to 1 inch.) 



a. Quarlz roclt. 



.'. Amygdaloid (agates). 



/. Fissile sandstones. 

 ff. Soft pint sandstone. 



h, i. Pink, blue, grey, and brown 

 fine sandstones (much jointed). 



Fig. 2. — Section of a Gold-claim (Lawrence's), 

 Pilgrim's-Rest Creel; Transvaal. 



of rock. c. Decomposed Diflrite. 



Fig. 3. — Section of Cobalt-mine 

 near Nazareth, Transvaal. 



Fig. 4. — Section of Diorite Dylce with veins of quartz 

 carrying iron pyrites and traces of gold. 





?//', 



a. Soft pink sandstone, very fissile. 



b. Decomposed diorite with quartz ' 



Fig. .">. — Section of Natalia Reef, Eersteling, Transvaal. 



''""'■■ reef, aboul f. feet thick. 

 ' ateatitic aobiit. 



Fig. 6.— Vertical Section of East End of Kimberley Mine. Fig. 7.— Tilted Dolerite (1), Be Beer's Mine, Diamond-fields. 



"■ f. ' "i' 1 ' l™e (tufaceous). e. Hard brown shale, 



t. Blue-grey shale /. Em1 sand , l0036 ab 



''■ Nil tii, much broken. 

 (I VellowiBli-brown shale. 



a. Red sand, 



h. OaloapeouB layer. 



c. Soft euphulid'e. 



d. Tabular dolerite. 



