744 



H. A. BROUWER 



The roof of the laccolith would, then, not be formed by the 

 sandstone series of the Waterberg system but by the volcanic 



TABLE I 



Table of the Geological Formations of the Transvaal 1 



series, in which sometimes red granites can be seen clearly intrusive. 

 But the question of the mutual relation between the rocks of the 



1 Cf. G. A. F. Molengraaff, "The Deposits of Iron Ore in the Transvaal, " in The 

 Iron Resources of the World (Stockholm, 1910), p. 1060. 



