1853.] Report on the Geological Structure of the Salt Range. 447 



As far as we have observed no out-bursts of plutonic or volcanic 

 rocks occur in connection with the Korana strata, but the injection 

 into, what probably were, rents in the sandstone, of pure quartz veins 

 containing metallic ores, indicates their having probably been sub- 

 jected to igneous agency. The limited time we had to spare did not 

 permit of a more extended and careful examination of so interesting 

 a formation, barren and uninviting though it appears to the eye of 

 any one but a Geologist. 



In conclusion we may remark that quartz vein penetrating slaty 

 strata similar to those of Korana, have, in almost every part of the 

 world, been found to be the principal source of the richest metallic 

 ores. Gold ore is almost always found in quartz veins penetrating 

 the most ancient fossiliferous and metamorphic strata, but as that 

 metal is invariably found near the surface of its vein-stone, mining 

 gold has never turned out so profitable a speculation, as washing- 

 its "dust" from the debris of its vein-stones in the alluvial deposits 

 at the foot of auriferous ranges. We never have heard that gold 

 was ever seen in the alluvium at the foot of the Korana hills, but 

 the locality is one where we should expect to find it. 



The metamorphic strata of the western Himalayas towards 

 Cashmere, where they are so extensively invaded by igneous rocks, 

 are certain to be found, when duly examined, to yield rich metallic 

 ores. The difficulties attending investigations of the kind in such 

 elevated localities are, however, very great. Hitherto the field may 

 be considered as untrodden. 



Approximate heights above the sea level of localities in or near the 

 Salt Ranges referred to in the accompanying report, calculated 

 from the boiling point of water. 



Locality. 



Approxi- 

 mate height' 

 feet. 



Remarks. 



Mount Tillah, 



Gurjok Hill above Jelalpore, 



Plain at Jelalpoor, 



3,277 



1,882 



619 



619 



608 



2,547 



2,141 



Pucca Tank on Summit. 

 A little W. of village. 



Plain at Jutana, 





Pind Dadun Khan, 



Plain near Fort. 



Top of Koossuck Fort, .......... 



At the Musjeed. 



Tober Musjeed, 



3 L 



