140 MIDDLEM1SS: GEOLOGY OF HAZARA AND BLACK MOUNTAIN. 



of the anticlinal in the Grey and Nummulitic limestones, with a 

 prominent normal fault half-way between. The above anticlinal bring- 

 ing in the Jura- Cretaceous is a direct continuation of the exposures 

 i mile north of Dhumtour in these rocks, but the Trias fails to 

 put in an appearance. On its crest the anticlinal carries a small 

 synclinal. 



Between the two places marginally noted the hill-sides to the north 

 of the Dore river offer several very clear sections 



Sections on the north 



side of the Dore river of the lower Nummulitic and Grey limestones in 



between Dhumtour and . 



the Hertoh river. high scarped cuffs, with the coal-bearing band of 



Hewson's mine between them, and with the Cretaceous and Jurassic 

 formations below (see sketch section, Rec. G. S. of I., Vol. XXIII, 

 p. 269). All the exposures along this piece of country give evidence 

 of a geological structure, perfectly simple and intelligible when 

 viewed in its broader features ; but the minor details, especially 

 towards the base of the hill-slopes and along the (often gravel-hidden) 

 road cuttings north of the Dore, are complicated by small folds, faults, 

 and slipping of the rocks, with regard to which it is difficult to say 

 how much was due to primary earth-movements, and how much may 

 have been subsequently due to gentle yielding of the rocks since the 

 Dore river flowed in its deeply-eroded channel. This question will 

 be further discussed in the final chapter of this book. 



The gorge of the Hertoh river descends and joins the greater 



The gorge of the g or S e of the Dore river between high steep 

 Hertoh nver. cliffs, which here and there shew terraces of 



recent gravel, hardly sticking to the much scored and precipitous hill- 

 sides. Village communication along gorges of this kind varies with the 

 season. During the drier months of the year the boulder-strewn river- 

 bed forms the best and speediest footpath, but when the snow of the 

 Tandicini ridge is melting, and during the rains which follow, the hill 

 tracks must traverse along the sides of the ravine. They are steep, 

 and, because of the crumbling relics of recent gravel, often afford a 

 very precarious foothold ; besides, having been neglected during the 

 cold weather, they have generally slipped away in many places. 

 ( HO ) 



