204 ■WTNNE : GEOLOGY OF KUTCH. [PAUT H. 



Wurrar, the commanding tabular hill south of the mountaias just 



mentioned^ rises with precipitous sides entirely 

 Wurrar Hill. . 



isolated from the surrounding elevations. It is 



covered by a thick capping of black basaltj parts of which show 



columns of large size (quite equalling those of the Giant^s causeway in 



Ireland), horizontally arranged, other portions presenting the usual 



varieties of texture. Its arrangement as a horizontal cap, beneath which 



sandstones are seen on all sides, would favor the supposition of its 



occurrence as a flow, but it is impossible to say that it did not issue 



directly from beneath, particularly as several trap dykes of large size 



occur round the hill. The thickness is unequal, but its maximum may 



be stated at 200 feet. 



Beneath this are 690 feet of the pale-purple, flaggy, thick yellow 

 and white sandstones and shales of the upper Jurassic group, and many 

 others below, which have been taken to represent the upper portion 

 of the lower or transition beds. It is possible that a north-east fault 

 coincides with the long dyke, having that direction at the east side of 

 the hill, for the fossiliferous beds north of Dhosa were not found in the 

 valley north of Wurrar. 



The conical peak of Vichia and some adjacent hills to the west-south- 

 west are formed mainly of coarse sandstones undu- 



VicHaHill. , . , , . „ , , ,, 



lating nearly horizontally, but the summits are 



occupied by intrusive trap, columnar on the former hill, in the neighbour- 

 hood of which are some smaller intrusions. 



From this hill a ruggedly indented escarpment runs to the north- 

 west, the stronger sandstones of which have a low south-westerly dip, 

 and the valley between this and the widely curving beds of the western 

 spurs of the Jooria Hills is occupied by alternating shales and sandstones 

 forming strangely broken ground. 

 ( 204 ) 



