CONTRIBUTIONS TO THE GEOLOGY OF BENGUELLA. 



525 



undulating, and contain veins of quartz. This Kundelungu System of Cornet has 

 been assigned to the Carboniferous or Permian. Ball and Shaler (1914, p. 609) 

 remark, e.g., that the Kundelungu is the " Permian of most geologists " ; but according 

 to Studt (1914, p. 71) it represents the Transvaal System, and he regards it as there- 

 fore Devono-Silurian or Silurian in age. 



The Oendolongo Series has one significant feature in common with the Waterberg 

 System of the Transvaal, in which the upper part consists of red sandstones and the 



Fie. 9. 



lower, in the eastern part of the formation, of volcanic rocks and tuffs (e.g. Schwarz, 

 1912, p. 187). Ball and Shaler have, it is true, remarked (1914, p. 612) that 

 igneous activity, except for some diabase intrusions, had ceased before the deposition 

 of the Kundelungu beds; but according to Studt (1914, p. 56) the Kundelungu 

 beds are associated with basic lavas as well as having been intruded by a variety of 

 igneous rocks. The Oendolongo Series is probably the Benguella representative of 

 the Kundelungus, and I should be disposed to regard it as equivalent to the Water- 

 berg System of the Transvaal. If so, there is much to be said for the reference of 

 the Oendolongo beds to the Devonian ; but when examining these rocks I felt that 

 they might be much older and possibly be one of those unfoliated and comparatively 



