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



The depth of this cliff-enclosed ravine appears, from aneroid measure^ 

 ment, to be nearly 1,000 feet, made up of purple sandstone 450 feet, 

 the dark shaly (silurian) band 300 feet, magnesian sandstone 250, 

 and some 50 feet of the red, flaggy group No. 8, from which the red 

 oxide of iron is washed down over the face of the hard cliffs, staining the 

 light-colored underlying beds as deep a red as the overlying red zone 

 itself. The remaining 50 feet may be allowed for the salt marl which 

 appears nearly midway up the glen. 



This locality is interesting also as one of the two at which the 

 silurian fossils, referred to Obolus or Siphonotreta, 



Silurian fossils. p t mi ^ • i 



have been found. They were obtained on the 

 southern side of the glen, where one or two cross-faults or slips seem to 

 have let down the black shaly zone to the stream-level, not far from the 

 salt-station and well within the glen. The fossiliferous beds are tough, 

 dark, shales ; thin brecciated sandstone layers occur near the bottom of 

 the group, often of a greenish color, and some soft and light-coloured 

 clays are used for washing by the natives. 



In the magnesian sandstone group a coarse pisolitic or concretionary 

 structure was observed throughout some ten feet 

 of hard thin-bedded calcareous sandstone, and on 

 some of the bedding surfaces slight traces were found resembling the 

 tracks of annelids or mollusks, or sometimes having a fucoidal bunch- 

 like grouping. Thin beds of coarse purple and white breccia also occur 

 in places in this group, 



I^or a mile and a half westward of Jutana the same sections are 



exposed by the escarpment and the ground above 

 West of Jutana. . ^^ • ^• • i i 



it ; the nummulitic limestone in the latter position, 



having increased in thickness by 50 feet or more, projects southward 



from the main mass, accompanied by the underlying white sandstone, 



Nummulitic limestone liere with a ferruginous, red, and variegated 



and beds below it. ^j^^gy ^^^^^ ^.j^g farmer 16 feet and the latter 12 



feet thick. Over this the coaly shales are represented by about eight 

 ( 142 ) 



