94 MIDDLEMIBB< THE GEOLOGY OF IDAlt STATE. 



Whilst it is very probable that the gap, between Torda and 

 ■n * , .,i Ubsal or Umarvada, through which the 



Presence of Araval- " 



lis to the north of Boroli river flows, has been cut through 

 Mem doubtful. ftnd acrogs the j^ Q uartz it e , I am unable 



to say what lies concealed beneath the alluvium of the rather 

 wide plain, to the east of this, which T have not examined. It 

 seems likely that the eastern edge of the quartzite lies betwen 1 and 

 2 miles east of Torda, and that there the Phyllite Series follows 

 normally above it. At all events it is impossible to suggest 

 that in that valley any of the underlying Aravalli rocks lie 

 concealed. It is true that the strange bifurcation of the quartzite 

 ridges just west of Torda, along the line of what must be the axis 

 of the anticline in the quartzite, is suggestive of possible Aravalli 

 or other rocks here and recalls a similar position in the quartzite 

 hills between Dev Mori and Kundol and at Khercha (presently 

 to be described), and the same may be said of the similar but more 

 pronounced bifurcation of the ridge E. of Chorimal ; but these 

 areas are too much covered in with alluvium and scree material 

 for any exposures of solid rock to have been preserved. 



Considered as a whole, this, generally straight, but much locally 

 twisted and narrow, set of outcrops of the 



Evidence of intense Delhi Q uartz i te stretching from Bebar to 

 Compression. ^ ° 



Pal, all of which appear to be composed oi 



nearlv vertically dipping ribs of rock, seems to imply a very intense 



form of plication under probably enormous pressure, such that, 



though here and there the rock lias preserved some traces of its 



orio-inal bedding-planes, especially in its higher horizons, it has 



as a whole, and more particularly in its lower parts in contact with 



the Aravallis, behaved much as a semiplastic mass and been stretched 



here and bulged there, with resultant deformation probably by 



differential shearing of platy layers one over the other, so as to have 



considerably mutilated whatever simple structural folds it originally 



may have possessed. 



The remaining areas of relatively narrow outcroppings of the 

 Long chain of quart- 1)elhi Quartzite are nearly all connected 

 7.\to outcrops s.H. of together in a long and complicated chain, 

 Abhapur. Rn ~j a | gQ are a continuation of the outcrops 



last described near Abhapur. Their rational explanation on any 

 ordinary system of folding presents extreme difficulties. 



