THE QUIZZYHOTA LACCOLITE Ws 
sure of dolerite in the cutting, which may belong to the main 
laccolite or may be a horizontal dyke proceeding from it, or may be 
quite an independent body; farther away there is an exposure of 
dolerite in the small valley crossed by the railway but the relation- 
ships of this and dolerite in the cutting are uncertain. 
In the Amabele-Komgha laccolite the mass rears its head above 
the general level of the plateau which belongs to the 2,500-feet 
plateaut but which has been degraded by surface weathering some 
300 to 400 feet. The Amabele-Komgha laccolite was below the 
level of the original plateau, although now its bald head is exposed; 
the Quizzyhota laccolite, on the other hand, is only just beginning 
to appear on the plateau, being for the most part hidden by the 
sedimentary beds. 
~ THE SEDIMENTARY ROCKS INTRUDED BY THE QUIZZYHOTA LACCOLITE 
The Sedimentary Beds cannot be placed in any definite scheme 
as yet. They consist of whitish or light grey-blue sandstones, 
fairly loose in grain, interbedded with blue shales, weathering 
yellow. They correspond to the Karroo Beds as exposed in the 
Free State and Transvaal and to which Dr. Molengraaff gave the 
name of ‘‘ High Veld Series.” Farther east, at Idutywa, the white- 
ness of the sandstones becomes more pronounced and the shales 
become brilliantly colored with red, purple, and blue tints, but the 
ordinary blue shales occur as well. Dr. Rogers and myself gave 
these beds the name of the “‘Idutywa Beds.’ Subsequently Mr. 
Du Toit described the same beds from Queenstown and Burghers- 
dorp districts as the “Burghersdorp Beds.’’* There seems no 
necessity to reduplicate names, and the term “‘Idutywa Beds’”’ will 
be used here; eventually, if the connection is established with the 
Transvaal rocks, Molengraaft’s term will have to be adopted. The 
suggestion to call them the Cynognathus beds, from the occurrence 
in them of this remarkable Theriodont reptile, does not appeal to 
«EF. H. L. Schwarz, ‘Coast Ledges in the South-West of Cape Colony,” Q.J.G.S., 
LXII (1906), 70. 
2A, W. Rogers and E. H. L. Schwarz, ‘‘General Survey of the Rocks in the 
Southern Part of the Transkei and Pondoland, Including a Description of the Cretaceous 
Rocks of Eastern Pondoland.” Ann. Rept., Geol. Comm., 1901, Cape Town (1902), 28. 
3 Ninth Ann. Rept., Geol. Comm. 1904, Cape Town (1905), 77- 
