Fig. l.Section of the Dimtiantiferous Deposits at Natal Kopje, Cawood's Hope, and Qoruf-Gong. 

 (Distance about 2200 yards.) 



Fig. 2. — Section of the Diamantiferous Deposits on the hanlcs of the Vaal, from Hebron to Diamondia. 

 (Distance- about 3000 yards.) 



[To face page 6. 



1. Dark blue, slate-coloured, gravelly clay, with 



boulders. 



2. Tellomsli clay, with patcbes of calcareoua tufa. 



3. Bright red grarelly clay, 



a. " I^tten - stone." [Decomposed felapathic 



amygdaloid ? — T. R. J.] 



b. Metamorphic (?) rocks, covered with i 



boulders. 



;th many 

 rorn frag- 



. Eed, unstratified, clayey gravel, 

 boulders, and containing numeroi 

 mentfl of fossil wood. 



. Unstratifled gravel, containing " kidney- 

 stones," 



, Gravel, about 2 feet; no diamonds found, 



1. Black gravelly soil, containing diamonds. 



2. Reddish gravelly clay. 



3. Intense red, ochreous, gravelly clay. 



[No diamonds have yet been found in Nos. 2 and 3.] 



4. Portion of d that has been examined and found to contain 



diamonds. 



5. Blue, slate -coloured, gravelly olay, with boulders. Diamonds, 



6. Yellow clay, with irregular patches of calcareous tufa. 



Diamond.'^. 



7. Eieddish, oelu-eous, gravelly clay. Diamonds. 



[Nos. 5, 6, and 7 are superimposed upon a, and the in- 

 equalities of the surface of the latter form "pockets," in 

 which numerous diamonds have been found. All three 

 contain diamonds; their total thickness is from 2 to 6 feet.] 



a. " Rotten-atoue." [Decomposed felspathic amygdaloid ? — 



b. Metamorphic (?) rocks, forming the floor of the river-valley. 



c. Red gravel, unstratified, containing boulders, diamonds, fos- 



sil wood, and one fragment of fossil bone. [This gravel 



becomes paler on sinking into it, until it is almost white; 



some portions near the centre of the shaft are bound 



together by a calcareous cement.] 

 d. Cemented gravel and boulders, similar to the middle portions 



off. 

 f Yellow I sandy gravel, with boulders, in which few diamonds 

 a Bluish I ^^^^ ^^^^ found, except on the surface. 



Fig. 4. — Panoramic Sketch showing the reUiive heights from the Stormberg^ through Bloemfontein to Hebron on the Vaal River ; also of the sources of the Ky Gariep ( Vaal) and Nu Qariep (Orange) Uix 



DrAAEENSBERG or QnATHLAMBA RAKOE, 



Mont aux Sources, Cathkin Peak, Giant Kop, 

 10,000 feet. 1 0,357 feet. 9657 feet. 



3000 fft't \ 

 >Vii the sea, i 



5434 ft, 5698 feet. 



About 50 miles. 



AA. An elevated plateau, north of the Vaal River, of which the 

 Magalies Berg is the culminating ridge. Height nearly 

 7000 feet. ' 



1 which "Brak-pans" are formed. 

 CO. Witte Bergen, Orange-Biver Free State. Height unknown, 

 D. Maluti Bergen. 



E. Assvogel Kop. 



F. Washbank. 



G. Stormberg. 



