1847.] Notes, chiejhj Geological, from Qqoty to Hydrabad. 479 



area ; as well as saline incrustations of carbonate and muriate of soda, 

 both on the banks of the rivulets, and on the surface of the granite- 

 based plains on the western flank of these hills. 



The dykes of basaltic green-stone are occasionally seen traversing 

 the granite and hypogene schists of the plain, like a black wall, and 

 burying themselves in the sand-stone and lime-stone range to the east- 

 ward. An instance of this is observed about 4 miles S. of Dhone at 

 the boundary pass. This dyke is in some places 150 feet high and 

 200 broad. Its course can be traced for miles. 



The hill of Yeldoorty (22 miles S. from Kurnool) is of a poor ferru- 

 ginous quartz rock veined with white quartz, the rocks in the plain, at 

 its base, are granite and gneiss, with reddish felspar, penetrated by trap 

 dykes. 



At Woolundarconda (14^ miles S. of Kurnool), the granite rises 

 in small, but picturesque tors and logging stones. Here the sand-stone 

 range approaches the road. A little further N. massive hornblende 

 schist is seen in weathered and apparently waterworn masses. 



The range terminates in the bluff whale-backed, sand stone hill of 

 Juggernauth, about 3| miles south of Kurnool, whence the blue lime- 

 stone and its associated shales base the plain to the banks of the 

 Tumbuddra and Hendri at Kurnool, — the hypogene schists occasional- 

 ly showing themselves. Here regur is the prevailing surface. From 

 Gooty to Taikoor reddish sandy alluvial soil is much blended with it. 



From Kurnool to Paugtoor. — After crossing the Rajghat ferry over 

 the Tumbuddra, the tongue of land (here 16 miles broad), which lies 

 between it and the Kistnah, is traversed ; like most others trips of land 

 similarly placed, its surface is slightly convex, — rising gently towards 

 the centre from the beds of the rivers which flank it. It is for the 

 most part covered with regur, occasionally mixed with alluvium, based 

 on the blue lime-stone of Cuddapah, — a bed of kunker often intervening. 

 This soil is often 15 feet thick. 



The wells naturally deepen towards the centre. One is 61 feet 

 deep. The lime stone is rarely seen above the surface ; the dip ap- 

 pears to be quaqua versal in some low mammiform elevations ; in other 

 localities it is nearly horizontal, or dipping at an angle of 5° towards the 

 east. 



