356 Capt. Cullen's Notice of the Geological Features 



Third. The open level country from the Nulla Mulla hills 

 to Banaganapilly. 



Fourth. Ihe tract of tabular land between that town and 

 Gootty. 



Fifth. The level country from thence to Bellary. 



The geological characters of this tract are equally remark- 

 able, and admit of a division corresponding perfectly with its 

 geographical features. 



In the first division the prevailing rocks are granite. 



In the second, clay-slate and sandstone. 



In the third, compact blue limestone. 



In the fourth, clay-slate and sandstone. 



In the fifth, granitic. 



I have ventured to characterize each division by one or two 

 rocks only, because in each of them the rocks specified were, 

 in general, beyond all comparison the most abundant. In the 

 several divisions, of course, were found many of those minerals 

 by which the principal rocks are usually accompanied; but to 

 enumerate the whole of these as they occurred may not be 

 deemed necessary, since the specimens themselves are for- 

 warded. 



Before entering into a detail of the rocks prevailing in these 

 tracts, it may be proper to notice, in a general way, their 

 absolute heights above the sea. 



The north-west side of Pootoor, at the distance of sixty- 

 four miles from Madras, exclusive of windings, stands about 

 500 feet above the sea ; exhibiting a rise of eight feet in the mile ; 

 and this proportion holds good throughout that part of the 

 route, interrupted only by one undulation on the east side of 

 Naggery, and by a second between Naggery and Pootoor. 



These undulations, which rise 100 or 150 feet above the ge- 

 neral level, mark the course cf chains of hills, which in such 

 places cross the road ; and, in general, in all these sections of 

 the terrcpleine of a country, similar abrupt elevations may be 

 considered as indications of the presence, and course of a chain 

 of hills. There is a third rise a little beyond Pootoor, indi- 

 cating like the former, the presence of a mountainous range. 



The valley of Tripetty is, on a mean, about 360 feet above 

 the sea, but the river which runs through its centre little above 

 300. The mean height of the valley from Baulpilly to Wun- 

 timettah, an interval of about 52 miles, is about 550 feet, 

 and the town of Cuddapah itself a little below 500. 



Chinnoor on the Pennar river, five or six miles north of 

 Cuddapah, is about 30 feet lower than that place; but the 

 height of Jungumpilly, the next march, is 700 feet. There 

 is then a fall of about 100 feet to the Saghilair river; after 

 which it rises gradually to Alinuggar and Iddamacul, both of 



which 



