264 MIDDLEMISS: GEOLOGY OF HAZARA AND BLACK MOUNTAIN. 



B, also shews a greater compression, as evinced in the finer struc- 

 tural details of the rocks. 



Taking now for consideration the different amounts of compression 

 marking the Nummulitic zone C from the U. Tertiary zone D, we 

 shall find no difficulty in recognising the great contrasts in the nature 

 and amount of the folding of these respective zones. It would only 

 be tedious to insist again on facts abundantly illustrated in the des- 

 criptive part of this book, as regards the Nummulitic zone, and on the 

 facts as represented in Mr. Wynne's sections for the U. Tertiary 

 zone. Here, as before, the more elevated zone.C is more com- 

 pressed than its south-eastern neighbour D. 



It is only when we come to contrast the Slate zone B with the 

 Nummulitic zone C, in the above respect, that opinion halts for a 

 moment to consider ; and it would not be perhaps fair to draw too rigid 

 a conclusion from the figured horizontal sections which are not con- 

 tinuous with one another. Nevertheless, I think that, disregarding 

 details, we may draw a general conclusion to the effect that the 

 flexures and fold-faults in zone B are grander, straighter, and tend 

 (especially along the northern sub-zone) more to an isoclinal nature 

 than in zone C. As illustrating this we may note the long straight 

 outcrops coinciding with the strike of the rocks in the former, and 

 the winding and V-ing outcrops which predominate over much of the 

 area of the latter. At least it cannot be said that the law is reversed 

 in this case. 



Thus we find that just as the amount of the disturbance of the 

 zones, gauged by their general upheaval, decreases in a south-east- 

 erly direction, so also does their disturbance, inferred from the 

 lateral compression they have suffered, steadily and regularly de- 

 crease in the same way zone for zone. 



The relative difference between the different zones in the matter 

 of the amount of denudation which they have 



Relative amount of & . , , 1 . . , , ,.,- , 1 



denudation of the suttered has been considerably dilated upon 



earth's crust in the already in the descriptive orography and sum* 

 various zones. J r t> r y 



mary of each zone. It has been abundantly 

 shown that the zone most backward in this respect is the outermost 



( 264 ) 



