GEOLOGY. 



25 



Post-tertiary. 



The post-tertiary conglomerate of the Kalabagh mountain, not 

 having been elsewhere met with, may be presumed 

 quite a local deposit analogous to some boulder 

 beds in the Son part of the Salt Range long since recorded by Mr. 

 Theobald (see Mem. Geol. Surv., Vol. XIV, p. 114). 



The alluvium of this region includes coarse boulder deposits, 1 loose 



sands, and more clayey accumulations, the latter 



occupying the lower grounds. 



In order to show at a glance the relations of the formations of this 



district with those of the Western Salt Range, as well as the groups 



absent from the series in these neighbouring regions, the following table 



has been constructed to include both series in parallel columns : — 



Alluvium. 



Comparative Table of formations. 



Trans-Indus Series. 



(Natural Order). 



Quaternary. 



Alluvial and 13. f Bain-wash and superficial 



Subrecent • <■ deposits. 

 Post-tertiary 12. {SgjKfc" 4 *T 



Pliocene 



Miocene 



Cainozoic. 



... ( Upper Siwalik. Conglo- 

 '(. merates, clays. 

 ("Lower Siwalik. Sand- 

 stones and clays with 

 fossil bones. 



Overlap. 

 Kalian or Murree Beds. 

 Slightly represented pur- 

 ple or gray sandstones 

 and red clays. 



10. -I 



West Salt Range 

 representatives. 



The same. 



15. The same. 



Unconformity. 



14. Upper Siwalik. Conglome- 

 rates and clays to the north. 



13. Lower Siwalik. Sand- 

 stones and clay with hones. 



12. Wahan or Murree Beds. 



Slightly represented: the 

 same as opposite. 



1 In the Memoir on the Salt Eange (I. c, p. 115), I have suggested the subterranean 

 extension of the boulder zone bordering the Salt Eange to the southward. Dr. Warth 

 informs me that a well has been sunk (since the country was examined) at the edge of the 

 boulder zone to supply the engines of the wire tramway from Khewra. After passing 

 through this for some 20 feet or so, thick alluvial clays were found for the rest of the 

 whole depth of the well, which was sunk about 100 feet. It would hence appear that these 

 boulder fan deposits are more or less superficial. 



( 235 ) 



