228 WYNNE : GEOLOGY OP THE SALT RANGE IN THE PUNJAB. 



Further on, the stream runs through the sandstones, &cc., of 



group No. 5, and between masses of the carbon - 

 Slip fault. . • 1 i • 1 n ,1 



iferous hmestone, that on the right side oi the 



stream being displaced, shaken, and brought against the " purple sand- 

 stones " by a fault along which the lavender clays of the group (No. 5) 

 are crushed into contact with the lower purple sandstone beds. 



The stratification of the rocks at the head of this glen is well seen, 

 Head of Choya glen the '^ purple '' and " speckled '^ sandstone groups 

 and ascent to the north. dipping at 50° to the northward and rising into a 

 high hill overtopping the plateau country. The northern slopes of this 

 hill are on the dip of the bare rocks, lessening with the descent, until 

 nearly at the foot they pass beneath an outlying patch of the carboniferous 

 limestone, partly horizontal and partly taking the opposite inclination 

 of a synclinal curvature. Two or three streams meet here ; following the 

 most northerly over rough ascending ground, the " purple sandstone " 

 and overlying groups are passed, and a curious narrow, deep, winding cut, 

 which can be touched at once on either side, leads through the carboni- 

 ferous limestone cliffs, up over a " bad step '•' and into the basin occupied 

 by the triassic and overlying groups of the Choya section (fig, 40, PI. 

 XXIII). Immediately over the village of Choya, much "red marP^ and 

 several hetereogenous, fragmentary patches of the other groups are exposed. 



To the westward in the gorge between the village of Choya and 

 Gorge between Choya ^^rcha (often called Wurcha) the red salt-marl is 

 and Varcha. again largely exposed ; here it contains salt and 



produces a white eflSorescence from saline portions called by the natives 

 tur. It is much cut up by slips, but there appears to be an 80-feet 

 band of purple marl and thin sandstone below the uppermost 30 feet of 

 the red marl ; the gypsum in this causes it to retain some traces of 

 stratification in the neighbourhood. The lower 60 feet of the overlying 

 purple sandstone group is unusually argillaceous, and this appearance of 

 an alternation between an upper baud of the red marl and the lower 

 portion of the purple sandstone is also seen in a few other places in the 

 vicinitj'. 



( 228 ) 



