1853.] Report on the Geological Structure of the Salt Range. 239 



On the Geological Structure of the Salt Range in the Runjaub. 



All the rocks forming the Salt Eange appear to belong to the 

 strata termed fossiliferous by Sir Charles Lyell, whose classification 

 will be followed throughout the present Eeport. 



We recognize then the following formations in an ascending order, 

 and under each of these shall endeavour shortly to describe their 

 various characteristic subdivisions, noticing as we proceed the mi- 

 nerals, &c. which they yield. 



^a. Eed marl with gypsum and rock salt. 

 h. Lower red sandstone and grit, with conglomerate. 



c. Greenish micaceous sandstones and shales with 

 grey dolomitic (magnesian) sandstone. 



d. Upper red variegated sandstones, grits, conglo- 

 merates and clays. 



r 



[ a. Lower limestone, calcareous sandstone and shales. 

 -<! b. Grey sandstone and shales. 



Upper limestone, sometimes magnesian. 



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c. 



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a. Yellow iron-stained quartzose sandstones, grits 



and bituminous shales. 



b. Cherty thin bedded limestones with shales. 



c. Green Belemnite sandstone and shales. 



• f 



g J Brown calcareous sandstone, nummulite limestone, 



o 1 marls and alum shales with lignite. 



§ J Greenish sandstones argillaceous grits, conglomer- 



o j ates and red and green clays. 



g < Alluvium. 



Primary , fossiliferous Devonian Rocks. 



a. Eed marl with gypsum and rock salt. This rock gives to the 

 Salt Eange one of its most characteristic features, appearing generally 

 at the foot of its southern escarpment, and in the bottoms of the 

 various deep ravines which intersect the hills. 



2 h 2 



