INTRODUCTORY, go 



Cousidering- this more from a mineralogieal than a geoloo-ical point of 

 view, he has dwelt at greater length upon the mines, mineral produc- 

 tions, and immediately associated rocks, than upon the geoloo-ical suc- 

 cession ; and were it not for his minute and accurate survey of the mines 

 the stratigraphical relations of the salt deposits here would have remained 

 longer unknown. 



Another report by Dr. Warth forms the ''Appendix!)" to the 

 ,f i«-n'7i ^^^^ " Ammal Report of the Inland Customs Be- 



His report tor lo/U-7i. ,./<-,« 



partment" (1870-71, published in 1872). In this 

 the engineering operations of the year are first detailed, and fresh matter 

 added, including a geological description of Jogi Tilla (or Mount Tilla) 

 with reference to a proposed trial shaft (since commenced) in order to 

 .discover whether the great salt deposits exist in their usual place beneath 

 that mountain."^ A map and sections of the locality are appended. 



Coal formation. — Coal, alum-shale, and marl 



r Green sandstone 

 Sandstone formation ) gj^g marls 



(Red sandstone 



fUpper layer of white gyp- 



I sum 



Salt formation ... J l'''^ ''^ ^^^^' "^^ ^^^^'^^ 

 Jorown gypsum 



Lower layer of white gypsum 

 I^Salt marl and salt 

 FoZcawJc— Trap piercing through the lower strata up to the boundary betwe 

 the upper layer of white gypsum and red sandstone. 



Feet. 

 Sandstone formation ... ... , . 1 325 



Salt formation 



Thickness. 



Average. 





20' 



100—150 



125' 



400'— 800 



600' 



5' 



5' 



60'— 200- 



130' 



80—200' 



140' 



a 200' 



200' 



600' 



600' 



The following succession of strata at Mount Tilla is given : 



1,075 



2,400 



Nummulitic limestone 



Variegated strata 



Green sandstone 



Dark shales 



Red sandstone (minimum) 



Gypsum (minimum) ... ... ,_^ __ 130 



"850 



Feet. 

 70 

 80 



200 



135 



235 



( 29 ) 



