Fig. 2. — Sketch-plan showing the loop of the Beka River at the great 

 fault, near the confluence of the Rondidu River. 



%, 





[Scale: 1 inch = l mile.] 



The ridge of pebbly sandstone rises 500 feet above the river, and forms high 

 cliffs at the bend. The rock, altered to quartzite and much shattered and 

 veined, plunges steeply as it approaches the fault, which is well exposed 

 in the bed of the river, and also in the Rondulu stream-bed. 



Pig. 3. — Sketch-diagram of the fault along the Deka River, about a 

 mile belovj the railway-bridge, looking north-eastward. 



N.W. 



S.E. 





a = Rugged kopjes of 

 coarsely porphyritic 

 basalt, breaking into 

 a cliff above the river 

 in the foreground. 



b = Conical kopje, about 

 200 feet high, in the 

 middle distance, ex- 

 hibiting the fault in 

 a river- cliff at the 

 bend. Vertical bands 

 of quartzite, much 

 veined and shattered, 

 occur on the right 

 side of the fault. 



c = High bluffs of pebbly 

 sandstone, extending 

 in terraces which 

 reach the right bank 

 of the river. 



