Capt. Grant on the Geology of Cutch. 



309 



sents a wall of rock, split by such perfectly vertical lines, that at first sight I 

 thought the stone was columnar. 



Bank near Jarra : — a. laminated series ; b. compact sandstone. 



The range of Roha-ke-Koss, composed of beds of the fourth or upper se- 

 condary formation, is a good example of disturbing action. It is situated 

 between the villages of Joorun and Lodye, on the borders of the Runn, 

 and extends nearly east and west for eight miles, presenting, to the north, 

 a perpendicular cliff of sandstone, which rests on a sloping talus of lami- 

 nated sandstone and slate-clay, and dipping at a high angle to the south- 

 ward. About three quarters of a mile from this main range, and parallel to 

 it, is a ridge of smaller hills, consisting principally of basalt, intermixed, in 

 some places, with the same sandstone as that of the main hill ; and which, 

 in the banks of the nullahs at its base, overlies the laminated strata. The 

 space between the two ridges is composed of large broken masses of sand- 

 stone, covered by a thick bed of gravel, evidently the detritus of the hills. 

 In this instance, the strata of the Koss range dip towards the south ; and, 

 at a short distance to the north of it, we find a mass of basaltic or igneous 

 matter, which probably raised the hills in its passage up, and established 

 itself at their foot. Large basaltic dykes, disturbing the strata through which 

 they pass, are observable in many of the river banks in the immediate neigh- 

 bourhood. 



The beds of nummulitic limestone, on which Luckput stands, present, as 

 before stated (p. 300), most decided marks of elevatory movements, consisting 

 of a central platform of horizontal strata, with inclined beds on the flanks. 



Another most striking example of the effects of igneous action in upraising 

 hills, occurs in the nummulitic limestone, near the village of Punundrow; and 



2s2 



