PRE-CAPE ROCKS OF THE NORTH OF THE COLONY 105 



axis of a low anticline in the Matsap ridge, though the 

 underlying rock is not exposed. At the south end of 

 the ridge the Matsap beds are seen to rest unconformably 

 upon the Griqua Town beds, but no specially thick con- 

 glomerate is found there. 



In the high ridges of the eastern foothills of the Lange- 

 bergen south of the Bechuanaland fence the conglomer- 

 ates have a hard quartzitic matrix with pebbles of quartz, 

 quartzite, jasper, diabase, and granite ; they lie some 

 distance above the base of the series. A superficial re- 

 semblance to the auriferous conglomerates of the Wit- 

 watersrand beds led to their being prospected for gold, 

 but without success. 



In the southernmost part of the Langebergen north 

 of the Orange Kiver, and in the Ezel Band, really the 

 continuation of the same range south of the river, there 

 are conglomerates with a red ferruginous and quartzitic 

 matrix with pebbles of quartzite, coloured jaspers, and 

 occasionally diabase. In this part of the range the beds 

 have been much sheared, and not only are certain beds 

 repeated at the surface by faulting and folding, but the 

 boulders and pebbles are stretched and flattened in a re- 

 markable manner. 



The shales are found chiefly in the eastern and western 

 foothills of the Langebergen north of Pad Kloof, but 

 they are also exposed in wells in the south of the Kor- 

 annabergen. They are slaty rocks with a considerable 

 amount of sericite. 



The quartzites, sandy phyllites, and grits of the Lower 

 beds are purplish- or reddish-grey rocks, but they have a 

 bluish colour on recently exposed surfaces. They are 



