chOra and the bazAr valley. 109 



Broadly speaking it would seem that the area between the Rohtas 

 Area between Rohtas hill and the B3ra Valley is bounded on either 



hill and the Bara Valley, 'ji 1 ■ «■ i ,1 r r> 1-1. 



side by carboniferous rocks — those or Kohtas 

 on the north and the altered beds of the Surghar Range on the south. 

 They form in the main a synclinal, and folded between them are 

 beds ranging in age from upper carboniferous to trias, and possibly 

 younger. 



The carboniferous limestones have already been described by 

 Mr. Griesbach, and I will, therefore, restrict 



Carboniferous. 



myself to the exposures not specially men- 

 tioned by him, viz.> that near Ba*ra Fort and that of the high hill 

 (Ghund Ghar), which stands on the southern side of the entrance 

 to the Khaibar. The former I have already described, and the latter 

 is very similar, with the exception that near the summit of Ghund 

 Ghar, the limestones are locally altered to a 

 finely crystalline marble of great beauty, and 

 are overlain by a band of highly ferruginous quartzite with beds of 

 alum shale, the whole capped by grey limestones. The intense 

 m Limestones altered by alteration of the limestones is found to be due 

 igneous intrusion. to intrusions of a green igneous rock, which 



occurs in several small patches on, and at the foot of, this hill. 



The overlying shale series— (e) of Mr. Griesbach's list — is first 

 r , AA , ., , met with at about i mile west of Jamrud Fort, 



Upper carboniferous to J ' 



permo-carboniferous. anc i extends thence into the Khaibar, where it 



forms low hills cut up in all directions by ravines, and continues for 



e . . . . . ,. many miles to the south of the Khaibar 



Shales between Lala J 



China and Chiira. road. This series was classed by Mr. Gries- 



bach as " upper carboniferous or even younger" and "possibly 

 triassic." From Lala China, about two miles south-east of Ali Masjid, 

 the road to the Baza"r Valley lay over these shales. For several miles 

 it ran almost parallel to the strike, but after crossing the Chura Pass 

 (about 5 miles from Lala China) it turned southward and ran almost 

 at right angles to the strike of the beds. On the western side of the 



( 109 ) 



