268 Report on the Geological Structure of the Salt Mange. [No. 3. 



to the central portion and western end of the Salt Eange. It first 

 appears at Noorpoor in the Nilawan ravine, where a thin bed of a 

 crystalline grey limestone containing a few Encrinites and Terebra- 

 tulse, may be seen resting on purple Devonian shales and covered by 

 a ferruginous claystone which marks the base of the nummulite 

 limestone formation, to be hereafter described. On tracing it west- 

 ward it gradually increases in thicknsss. Products and Spiriferae 

 appear, and in some places literally swarm. At Kuttha it is exten- 

 sively developed in the Nursingwan, where high cliffs of it may be 

 seen resting on Devonian rocks. 



Between Kuttha and Moosakhail, it perhaps attains its greatest 

 thickness, frequently appearing in scarped precipices and forming 

 the mass of the hills which intervene between the south side of the 

 Salt Range and the Sam-Sekisur valley. 



In this district rocks, probably of an oolitic age, appear between 

 the carboniferous ones and the nummulite limestone, and this rela- 

 tion may be observed on to the Indus and in the Chichalee hills. 



For a short distance on both sides of the Indus near Maree and 

 Kalibagh, the carboniferous rocks disappear ; but at Kooch about 

 four miles North of Kalibagh, they again crop out at the base of 

 the Chichalee range, and may be traced south to near Mulakhail, 

 where they are covered up by the oolitic and tertiary forma- 

 tions. 



They again appear on the right bank of the Indus below the 

 village of Bahadur Dak, and constitute the greater part of the Kaffir 

 Kote Eange, (washed by the Indus,) beyond the upper part of which 

 we have not traced them. As this Range stretches south and is evi- 

 dently a branch from the great Soohinan Range, it is probable that 

 the carboniferous rocks occur there also, but the hostility of the 

 hill tribes in its neighbourhood will, we fear, for years to come pre- 

 vent any attempts to gain a knowledge of its geological structure. 



In the Kaffir Kote Range, as far as we have had an opportunity of 

 examining it, the carboniferous rocks are immediately in relation 

 with tertiary sandstones and clays, no nummulite limestone or 

 Oolitic rocks intervening ; unless the bituminous brown sandstone, 

 which we now consider the representative of the upper member of 

 the carboniferous series, should turn out to be Oolitic. 



