DESCRIPTIVE GEOLOGY: NUMMULITIC ZONE. 187 



not easy to mistake for anything else. 1 Assuming this, the difficulty 

 is to account for their present position, for if the apparent anticlinal 

 is a real one, then the strata from Nummulitic limestone to Murree 

 beds, including the anticlinal, are upside down, a thing difficult to 

 believe and at the very least very improbable. But if the outlier was 

 originally a remnant of a much-folded synclinal, it might be better 

 understood as a noyeau synclinal det ache par etranglement (Heim 

 and Margerie) as indicated by the dotted lines in fig. 21. Possibly, 

 however, much of their present position is due to a surface slipping 

 and sliding en masse of the soft shaley material down the hill-sides 

 from an originally much higher level. 



I have not attempted by means of a horizontal section or other- 

 wise to indicate the precise nature of the foldings of the rocks in 

 the zone over which we have so far passed. It must be understood 

 that the reason for this is that there are no sections sufficiently 

 clear and free from forest and other surface covering as to warrant 

 such regular treatment. The descriptions of these gulee sections, 

 however, are given with a certain amount of detail, because of 

 their accessibility. A little further south-west in the zone, the 

 rock structure is much more easily deciphered, and has been selected 

 for the line taken by horizontal section No. 3. 



Returning to Doonga Gulee and continuing our irregular line 



Section from Doonga of section along the Changla road via Kamur 



Gulee to Changla Gulee. peak and Koonjee Gulee (the section here 



follows the bridle-road south-west of the ridge, not the new 

 Murree water-works road) we traverse at first diagonally across 

 the edges of Nummulitic limestone, apparently dipping 6o° — 70 

 south-east, which is followed by grey unfossiliferous limestone 

 up to a point north-north-west of Kamur. Here, with vertical 

 dip, comes in a slip of Cretaceous and possibly some Gieumal 

 sandstone and then more Grey limestone with varying dip, but 



1 Dr. Verchere, Journ. As. Soc, Bengal, Vol. XXXVI, 1867, refers to these rocks as 

 Geyserian, and speaks of them as composed of minute acicular crystals of albite, tufa- 

 ceous limestone, and covered by rubanneous and dark slate much disturbed. 



( '87 ) 



