Valley of Oodlpoor. 283 



gillaceous schists passing into greenstone schist ; they are of a 

 uniform and unfissured texture, and can easily be cut into slabs 

 of considerable length, which are used in place of beams in roof- 

 ing. 



The strata forming the two ranges just described do not bear 

 precisely in the same direction. The eastern range with its 

 strata stretches N. and by E., and S. and by W. The western 

 range, on the other hand, bears N.N.W. From this arrange- 

 ment, it follows that the Valley of the Puchola has a somewhat 

 triangular shape, as if it had been formed by a disruptive force 

 operating on the principle of a wedge. The eastern range, if 

 produced towards the south, would meet its fellow of the oppo- 

 site side : in this direction, however, it terminates rather abrupt- 

 ly. Similar phenomena I have observed as characteristic of 

 many other of the narrow valleys ; and I believe that traces of 

 the same kind of arrangement may be detected in the distribu- 

 tion of the principal hill ranges of this portion of India. To 

 this subject I may again revert. 



The ridge on which the city stands merges, at the northern 

 extremity of the Puchokj into a broad tabular range of similar 

 altitude. This range corresponds with the axis of the valley ; 

 and the strata, as they emerge from beneath the surface of the 

 water, follow a course nearly N. and S. The strata are of quartz- 

 rock, flanked on either side by argillaceous schists ; and towards 

 the centre they exhibit marks of rupture and dislocation. This 

 range is continued for about a mile to the north of the city, 

 where it terminates abruptly, its base being watered by a small 

 gil or tank, surrounded by a tract of low marshy ground. A 

 short distance to the north of this position we have the detached 

 hill, mentioned as situated to the west of the series of strata de- 

 scribed above as remarkable for the extent of their deviation 

 from the usual line of bearing. The hill in question is ridge- 

 shaped, and from its position seems to be an out-lier of the ta- 

 bular range just alluded to. The rocks composing it, however, 

 are of a different character ; the strata bear N. and S., with a 

 slight tendency to the W. of N. They consist of a very hard 

 siliceous magnesian limestone, alternating with a granular quartz. 

 The limestones are of a bluish or greyish colour, of a fine gra- 

 nular or crystalline texture, and are feebly translucent at the 



