DESCRIPTION OF SECTIONS. 225 



The section, Fig. 16, is taken about four miles to the south-west 

 of Tafui hill. The tuffs a are succeeded by a limestone which 

 apparently underlies them, but it is quite possible that the dip is 

 inverted : about three miles further on the road that leads to the 

 peak called Sheikh Hosein, a limestone similarly placed and con- 

 taining nummulites is seen to distinctly overlie the volcanic rocks. 

 In the present instance the limestone b is altered to such an extent 

 that no fossils can be recognised. Next come green slates c with 

 very well marked cleavage. Next we find a great longitudinal 

 valley separating the range into two principal masses and occupied 

 by a syncline of Siwaliks. These consist of the usual sandstones, 

 coloured clays, and conglomerates. At k the junction with the 

 older rocks is very clearly exposed showing a complete uncon- 

 formity : the lowermost bed of the Siwaliks is a conglomerate con- 

 taining rock fragments and even fossils derived from the strata d. 

 The axis of the synclinal trough is very distinctly exposed in the 

 shape of a well-marked flexure, the uppermost bed consisting of 

 conglomerate. Upon the Siwaliks rest great horizontal masses of 

 recent gravels. 



The strata at d are shales and sandstones with a few very 

 narrow bands of limestone, absolutely similar in appearance to the 

 recks of the great range east of Nushki (Fig. 6) ; but in the 

 present instance, some recognisable fossils were found in a few beds 

 of limestone or calcareous sandstone : there are very large indivi- 

 duals of Nummulites granulosa , d' A. and H., a fossil characteristic 

 of Khirthar beds met with in other regions ; it is associated with 

 numerous specimens of an undescribed nummulite which also occurs 

 abundantly amongst the Khirthar strata of Saindak (page 83) In 

 the present instance therefore these shales and arenaceous sand- 

 stones may be safely ascribed to the Khirthar stage. The dips are 

 high, but the effects of compression are very moderate especially 

 when compared with the disturbed condition of the slates c. But as 

 we continue travelling across the section, the effects of compression 

 gradually increase until we get at e the most intense slaty 



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