DESCRIPTION OF SECTIONS- 21$ 



denudation. Occasionally limestone bands occur, which sometimes are 

 full of broken fragments of shells, but nowhere have any fossils been 

 met with in a sufficiently good state of preservation to be identified. 

 Veins of calcite are abundant in the shales and calcareous sandstones. 

 Similar rocks occur along the northern continue 



" Kojak shales." . . ,. 



ation of the ranges in the Kojak pass where 

 they are greatly contorted ; from that locality they have derived the 

 name of " Kojak shales." 



The section, Fig. 6, has been drawn to give a general idea of the 

 kind of disturbance exhibited in this region. It is of a somewhat 

 diagrammatic nature, as it is drawn approximately at right angles to 

 the line of strike, while the line of march was really an oblique one, 

 and it unites therefore features which should be shown on several 

 separate sections. But as the same type of structure continues for 

 great distances along the strike, the diagram gives a fairly accurate 

 idea of the kind of structure. The section represents the eastern 

 part of the range as seen along the road to Nushki j it consists of a 

 number of parallel ridges extending between the plain of "Gurgina," 

 there called " Kardagap " to the east, and to the west a rather broad 

 valley called " Kishingi." It will be seen that the disturbance is of 

 a somewhat moderate character, and except in one place there is 

 no sign of slaty cleavage. If the same section had been continued 

 about an equal distance further west, we would have reached the 

 escarpment that overlooks the desert. It is not necessary to draw 

 this second part of the section, as it would be purely diagrammatic. 

 Moreover, the structure remains exactly the same until close to the 

 neighbourhood of the final escarpment. At a distance of about two 

 miles from that limit the character of the rock changes somewhat 

 rapidly. First the folds become much sharper and more numerous 

 and then cleavage sets in, transforming all the rocks into one mass of 

 soft silky slates, amongst which no original structure can be recog- 

 nized. Wherever the rocks are thus altered, assuming the facies of 

 the <( Kojak shales," quartz veins are largely developed in addition 

 to the usual calcite ones. The cleavage dips very steadily to the 



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