282 Mr Hardy on the Geology of the 



able us to detect the cause of fallacy. About half a mile to the 

 westward of this position occurs a detached hill, the strata of 

 which are of an entirely different character, and bear to the 

 N.N.W., so that the series just described does not appear to be 

 continued far in a westerly direction. On the contrary, from 

 occasional outcroppings of the strata forming it, we learn, that, 

 in the southern portion of the valley, it acquires a line of bear- 

 ing more in conformity with the other strata of the neighbour- 

 hood. The phenomena of the cleavage lines I have not seen in 

 any other situation in the Valley of Oodipoor * ; and it is 

 somewhat remarkable, that, in the instance in which the strata 

 are observed to deviate the most from the usual direction, the 

 cleavage lines, as if to compensate for the irregularity, should 

 acquire a direction parallel to that which the strata might a 

 priori have been expected to follow. 



The hill ranges which bound the Valley of Oodipoor to the 

 westward, are similar in form and constitution to the eastern 

 barrier ranges. Immediately to the south of the city we have 

 a longitudinal rocky hill, distinguished by a remarkably sharp 

 spire or crust, which in its course from south to north describes 

 a curve rising gradually in the former direction, and again de- 

 scending towards the north, where it is separated from the low 

 ridge of the city by the deep and rugged chasm across which 

 the principal hund of the Puchola lake has been thrown. The 

 lake is situated in a narrow longitudinal valley, between the 

 ridge just alluded to and another sharp crested range to the 

 westward. The city ridge is composed of a quartz-rock simi- 

 lar to that of the Oodisagor hund ; near the base on either side, 

 the quartz passes into and alternates with the argillaceous schists. 

 The range to the westward of the Puchola is composed of ar- 



• Similar appearances are by no means uncommon in Rajpootana. At 

 Deosa, about forty miles east of Jepoor, there is a remarkable insulated hill, 

 composed of strata of semitransparent quartz, a very straight layered gneiss, 

 and a gneiss of a peculiar waved aspect, which form frequent alternations with 

 one another ; and all these are characterized by cleavage lines placed at right 

 angles to the strata seams. Some of the gneisses have a tendency to acquire 

 a concentric laminar structure, and, in consequence of this tendency, indivi- 

 dual strata, where exposed at the surface, have acquired throughout an appa- 

 rently cylindrical form. There are other peculiarities in the stratification of 

 this hill which I have no space to allude to in this place. 



