2o6 M1DDLEM1SS: GEOLOGY OF HAZARA AND BLACK MOUNTAIN. 



Again on the "m" of Kurum a section 80 feet thick in these beds 

 shews alternations of dark reddish-purple shales, or hardened clays, 

 and fine sandy purple conglomerates. 



A little behind the line of section and south of Seer there is 

 Jura-Triassic wedge a faulted-in narrow wedge of Jura-Triassic 

 south of Seer. rocks, which crosses obliquely the two lower 



bifurcations of the ridge-spur descending from Changla Gulee, and 

 expands towards the higher slopes of Chumbi into the complicated 

 section between Changla and Khaira described before (p. 192). 



The only other interruption to the monotonous Nummulitic lime- 

 River-gravels near stone s P urs and ridges in the section is that of 

 Nugreeand Loruh. the gravel terraces. Their last appearance up- 



stream is near Nugree. Between Loruh and Nugree the pathway 

 follows the Hurroh river-bed, and we pass continually under the 

 almost vertically-cut cliffs, 200 — 300 feet high, of compacted gravels 

 or rolled boulders, chiefly of limestone. 



Viewed comprehensively, the line along which our present section 



_. . „ has gone, and the parallel sections introduced 



The section as a 5 > r 



whole. in expansion of the same, are such as possess 



the great redeeming feature of being easily understood in their main 

 structural components. Running as they do across strike ridges 

 and ravines, which mount up to or tap the gulee watershed, they offer 

 keys for the easy solution of the perplexing questions of structure 

 and arrangement found along that watershed. 



(j) Sections explanatory of horizontal section No. 4, from Jub to 



Sydpoor. 

 The great regularity of feature and structure possessed by the 

 Nummulitic zone enables one to pass at once 

 Generalities. from horizontal section No. 3 to horizontal sec- 



tion No. 4, which lies almost at the other end of the zone. In 

 describing No. 4, the same method will be observed as before of 

 comparing different parts of the section with parallel sections, thus 

 linking it up with No. 3. 

 ( 206 ) 



