cviii Report of the Mineralogical Survey [No. 126*. 



nerally 60 to 100 feet ; but with regard to this point it may be observed, 

 that in the widest vallies these beds have least height, and vice versa. 

 Their face generally forms a precipice, in which all the several sizes 

 of stones may be seen sticking in a loose basis of gravel and sand. 

 Sometimes two or three terraces are formed, the last being of incon- 

 siderable height above the bed of the river. In the latter, may be 

 observed the same kind of stones that compose the terraces, leading 

 to the inference that the present opening was once filled up, and that 

 the river must have flowed so much higher than its present level. 

 It is a very remarkable circumstance too in these beds, and shews 

 that there is some connection between their accumulation and the 

 system of rivers, that they increase in extent as the river advances 

 towards the plains ; very limited deposits occurring in the upper part 

 of the course. 



238. The magnesian clay slate is found at the suspension bridge 

 over the Aluknunda, south of Sreenuggur, while close to the town, in 

 the bed of the river, a rock approaching to the character of micaceous 

 schist prevails. Perhaps it may more properly be called micaceous 

 quartz rock : it also dips to the southward. On ascending from Sreenug- 

 gur are seen the accumulations of rounded stones above the present bed 

 of the river, as determined by Barometrical observation. The rock is the 

 magnesian clay slate, which continues the whole way to Pooree, a village 

 on the high range which shuts in the Chipul river. It oscillates both 

 towards micaceous schist and towards talcose, its affinity to the latter 

 being greatest, but no genuine argillaceous schist is produced in any 

 of its changing types. The dip is in general conformable, i. e. between 

 N. and E., excepting immediately on the ascent from Sreenuggur, 

 where it was observed to be S. 10° E., the inclination being 60°. 



239. From Pooree to Olee, the road passses along the range above- 

 mentioned, crossing over it near the latter village which is situated 

 a little below in the bifurcations of a glen. Half way the slate is ex- 

 changed for quartz rock which appears stratified, dipping 65° N. E., 

 at an angle of 50°. Here also this rock possesses the veinous character, 

 appearing to traverse the other strata in masses much more remarkable 

 for their length than their breadth. It is seen to cross the valley 

 here, and continue its course on the opposite side ; occasionally it appears 

 to contain felspar. It passes into a green type, which gradually changes 



