150 MIDDLEMISS: GEOLOGY OF HAZARA AND BLACK MOUNTA I 



On Wynne's unfinished map of this part of the country he marks 

 the limestone band as one belonging to the Slate series. The pre- 

 sence of the Jura-Cretaceous and Nummulitics in regular order super- 

 posing the main rib of limestone, not to mention the petrological 

 character of the limestone, are sufficient to shew that the truth is 

 as indicated above. At the same time it must be remarked that 

 Wynne recognised the secondary age of some of this limestone as is 

 shewn by his remarks (Rec. G. S. of I., Vol. XTI, p. 121) where he 

 describes having found much-crushed ammonites among it (see ante, 

 p. 18, and Manual of the Geology of India, 2nd Edn., p. 116). The 

 fault on the north-west side of the wedge of younger rocks is self- 

 evident, but that to the south-east may only be locally present. At 

 Sariwali it must be absent as Hira Lai reported the presence of the 

 white quartzite which is the base of the Trias in this line of strike. 



Along the same line in a north-easterly direction there is another 

 small mound of Trias limestone surrounded by alluvium, and then a 

 wide stretch of alluvium with two deeply cut-down streams named 

 the Godawala N. and Huriala N., respectively, after which two pro- 

 minent hills near Oochar expose Trias limestone and the Jura-Creta- 

 ceous band in a wider outcrop than hitherto. The position and 

 lie of these are indicated sufficiently well in the view south-west 

 along the Slate zone (PI. 9). 



Leaving this strike fold of younger rocks among the slates, al- 

 though we can at once see from the map that the 



Section near Mohar, <-, . T , . , ,, 



5,815 feet, Deewal Seree and Juswal ridges carry on the same struc- 



village, and north of ture ; nor th-easterly direction, we must now 

 Naruh police station. J ' 



go south towards the southern boundary of the 

 Slate zone, and by the Deewal pass ascend the rocky height of Mohar, 

 5,815 feet, which is a mass of Trias limestone presenting a rough 

 and broken face to the north-west. To the south-east it reveals a 

 well-exposed scarp with the slates below it. Mr. Edwards found the 

 base of the Trias here to be (1) yellow, purple and variegated cal- 

 careous shaley layers with a bed of purple grit in the middle of them 

 one foot thick, and (2) quartzites, some of a light purple-grey and 

 others white with minute strings of red, of a saccharoid texture, and 

 ( 150 ) 



