90 KING: KADAPAH AND KARNÜL FORMATIONS. [PART I1. 
the eonsideration that some apparently very different looking grits are 
shore deposits of the same group, with which Iam in great part inclined 
to agree ; but perhaps it will be better to give his own notes, so that 
they may receive their proper value in the clearing up of this point :— 
“ To the north-north-westward of the Oondootla plateau, no rocks belonging 
to the digmond-bearing series of the KARNULS occur till we reach the west side 
of the Gardymuddagoo valley, where similar pebbly quartzite beds are met with near 
Bapulcotoor cropping out from under the Jummulmudgoo limestones and rising 
westward till they form the top of a low ridge of hills running along the right bank 
of the Toongabudra. On the west side of these hills conglomerates of the series are 
underlaid by a set of highly altered silicious breccias and calcareous rocks, but their 
exact boundary has not been fully determined. The pebble beds appear to continue 
north-westward into the hilly ridge south of Sultanpoor. On the south side of this 
ridge the silicious breccias and associated limestones anda large sheet of intrusive 
trap are seen to crop out from under pebbly quartzite beds which apparently form the 
base of the Banaganpilly group. These pebble beds are remarkable for containing 
numerous small pebbles of pink and reddish felspar undistinguishable from much of 
the felspar occurring in vein-granite of the adjoining granitic or rather syenitic region. 
The other pebbles consist of quartzite, grey chert, and red and brown jasper with 
occasional pebbles of quartz. Along the top of the ridge south of Sultanpoor, these 
pebble beds are well seen dipping east at alow angle with two or three intercalated 
beds of greenish grey and pale pinkish quartzite.” 
“The pebble beds present a reddish brown or purplish color externally when 
weathered, but are always lighter colored when freshly broken. There is a great 
difference in the degree of hardness dependant in great measure on the quantity of 
felspar pebbles and grit, but also on the greater or lesser tenacity and density of the 
silicious matrix. These felspathic conglomerates are especially well seen east of 
Beallumpad." 
“ A low ridge of similar brown pebbly quartzite runs due west along the north 
side of the Toongabudra to immediately opposite Kurnool, outside of Goondipurla fort. 
Where it abuts on the river opposite Poodoor, the surface is much and strangely broken 
up as if it had been worked for some mineral. Possibly the diamond workings below 
Kurnool, mentioned by Dr. Heyne,* may have been at this very spot.” j 
* Two small outliers of this conglomerate occur at Sultanpoor, one immediately north- 
north-west of the village, the other about a mile from the fort at Alumpoor ;—and they 
rest with the main mass of these sandstone beds south and east of Sultanpoor directly 
on coarse syenite of pink or reddish colors." 
“These pebble beds extend north-east from near Sultanpoor to Ulloor, and are finally 
lost sight of west and north-west of Mullyala, where they dip under the Jummul- 
* ** Tracts, Historical and Statistical, on India," by Benjamin Heyne. 
(90) 
