134 WYNNE : GEOLOGY OF THE SALT RANGE IN THE PUNJAB. 



marl^ faulted against the upper tertiary beds, and just at the top 



of the marls there occurs a massive band of pale, whitish grey 



dolomite, in places reddish and containing cherty nodules ; hard 



white granular bands occur in it, and it has 

 Dolomite in salt-marL ,, , , « t i -,- ■ i -i 



all the aspect or solid grey limestone, and weathers 

 in the same form, but does not effervesce with acid . It is well seen in a 

 low hill at the southern edge of the plain of Chanod, where its thickness 

 seems to vary from one hundred to one hundred and eighty feet. The 

 same rock occurs again, brecciated, in faulted ground amongst the red 

 marl, at the base of the Chambal scarp west-by-south from the same 

 villao'e, these being the only instances in which this bed has been found 

 along the whole range. 



The dolomite is overlaid by some four hundred and eighty feet of the 

 purple sandstone group, the beds becoming calca- 

 reous as they ascend, and including pale purple and 

 orange, vesicular and calcareous bands with green specks, some slightly 

 micaceous beds being more calcareous than others. These are succeeded 

 bv the dark shaly silurian band, here apparently thinner than usual, and 

 resting upon it are about forty feet of the compact light semi-calcareous 

 sandstones, of the magnesian sandstone group, passing apparently be- 

 neath some portion of the tertiary sandstones not well seen at the surface. 



Where the tertiary beds rest upon the silurian band at the south end 

 Junction of tertiary of the Chambal hill, the upper fifty feet of the 

 and silurian. purple sandstone group below this band is very soft 



and of a whitish colour ; the outcrop of the silurian shales is but ninety 

 naces across, with a southerly dip of 50°; and the Nahan sandstones 

 resting on them form ground like that on the south side of Diljaba, 

 their steeply sloping beds ascending to various heights upon the moun- 

 tain side. 



In the neighbourhood of JaMlpur, for a mile to the westward of the 

 town, and for several miles to the eastward, the 

 ^^' tertiary sandstones, couglomerateSj and clays dip at 



( 134 ) 



