542 



PROCEEDINGS OP THE GEOLOGICAI, SOCIEIY. 



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gOQ 



been before mentioned with regard to 

 Schaap-Kraal Hoek, &c., with openings 

 generally tending towards the south or 

 south-east; the outer face of the moun- 

 tains surrounding them is precipitous and 

 abrupt, as is the case with those previously 

 noticed. If these, under a cold and ri- 

 gorous climate, were once filled with gla- 

 ciers, then one is led to believe that the 

 evidence adduced traces their course from 

 the upper valleys of the Stormberg, lower 

 and lower, from one level to another, until 

 they joined at Buifel-Doorns Flat. Here 

 this descending and united force appears 

 first to have broken over the lower barrier 

 at a (see section, fig. 16), or it may have 

 made its exit at all three openings, until, 

 either from greater pressure at the point 

 h or some other cause, such as the more 

 rapid wearing of the rocks, the debris was 

 carried away to this lower level, until the 

 further erosion of c, reducing the level of 

 the drainage still lower, caused it to be 

 diverted finally in that direction. That the 

 level of the strata was at one time the same 

 as that of the respective outlets is clearly 

 proved by remains of them skirting difierent 

 portions of the plain, looking like the rem- 

 nants of so many raised beaches at the 

 different levels d d. 



If the outlets of these different basins 

 were again fiUed up, the flats would form 

 a series of large lakes, each many miles in 

 extent. In fact they look, even now, more 

 like a number of drained lake-basins than 

 any thing else. 



Another thing worthy of notice is, that 

 all the channels of the rivers of this por- 

 tion of the watershed of the Kei, such as 

 the Klaas Smit's, the Zwart Kei, the Klip 

 Plaats*, the Imvani, &c., cut through the 

 different mountain-ranges at nearly right 

 angles. Along the sides of these openings, 



* From the Klip Plaats Mr. Stow has sent 

 specimens, — No. 10, a coarse Dendrites, weathered 

 out on the face of a hard ferruginous sandstone 

 (like one sent by Dr. G. Grey : see Quart, Journ. 

 Geol. Soc. No. 106, p. 50), and No. 11, a piece of 

 fine-grained compact sandstone (quartz and fel- 

 spar), with the cast of a vegetable stem. — T. R. J. 



