EASTERN PLATEAU. 147 



a few small scattered crystals of galena.^ They are here rather more 

 than 200 feet thick, and make a fine vertical cliff below the sharp 

 top of the ridge. Beneath them comes the dark shaly Oholus zoi-\q, 

 nearly 200 feet, and then 450 feet of the purple sandstone, from 

 under which some of the red gypseous marl crops out, in faulted 

 contact with the tertiary sandstones, occupying the mouth of the 

 Choya-Saidan-Shah valley. The strata forming Karangli hill belong to 

 the western side of an open synclinal curve, the axis of which slopes at 

 a considerable angle to the north-east. As the beds crop out from under 

 each other, they also rise on the western slope of the hill, striking 

 obliquely towards the fault at its foot in such a manner that the section 

 is most full towards the southern end of the ridge.f 



The mouth of the Choya-Saidan valley is filled with the lower part 

 Structure of Choya of the tertiary sandstone series, embracing on the 

 valley (west). western side a broad anticlinal of the nummulitic 



limestone, along which the tertiary sandstones occupy the low ground as 

 far as the village above named. These sandstones, &c., are cut off to the 

 south-eastward by the continuation of the long line of fault striking 

 from the direction of Diljaba up this valley. The magnesian group is less 

 calcareous here than to the eastward, and from the prevalence of shaly 

 and sandstone bands, in the absence of the salt-pseudomorph zone, is 

 not easy to separate from the conglomeratic olive series No. 10. The 

 nummulitic limestone has been denuded, but apparently it originally 

 attained a thickness exceeding 150 feet. 



From Karangli to the south-westward, the strike of the rocks on the 



Eastern Plateau side of the Choya valley coincides 

 Karangli to south-west, p i • i • i 



pretty much with the course of this depression, the 



* As noticed by previous observers, this galena is much valued as surma by the 

 natives in the vicinity. 



t Mr. Theobald mentions {loc. cit.) a dyke of intrusive trap in tne fault under the west 

 side of Karangli mountain. The locality was searched, but no rock of the kind was found. 

 Doubtless some of the same volcanic rock as occurs in Khewra gorge exists in connection 

 with the salt marl, both here and at Gamthala (or Goddala) ravine. Its occurrence as 

 dyke would be interesting j it certainly has not that appearance at all at Khewra. 



( 147 ) 



