112 
Records of Ihe Geological Survey of India. 
[vol. IV. 
In the small sandstone area extending along the north or left hank of Godavari from 
Deorpali to Nandigur but little rock is exposed. 
Sandstones north of Godivarl near Deorpali. except ill the hills near the first named village, the 
greater part of the ground being thickly covered with 
river alluvium. The sandstones extend inland from one to two miles from the river bank, and 
consist principally of Damudas, Talchirs being seen 
Sandstone tract near Deorpali. at or outside of the northern boundary in two places, 
whilst the rocks forming the Deorpali hills are 
probably of Ivamthf age. It is possible that this tract and the corresponding one south 
of the river around Madavaram are faulted in places, as some of the few dips seen are 
confusing and anomalous. 
The exact position of the eastern boundary is, in great measure, undetermined. The 
first rocks exposed are in the Nandi Vagu* near Nandigur. In this, for about half a mile from 
the Goddvari, fine yellow felspathic sandstone is seen in places, dipping at a considerable 
angle to north-west* by west, that is, in the direction of the boundary. Metamorphics 
occur to the eastward, but not in the immediate neighbourhood of the stream. The last 
sandstone seen to the northward in the stream bed has low but irregular dip. Above this no 
rock is seen for more than a mile, but sandstones probably occur, because rolled pebbles of 
quartz, &c.. ar - e abundant west of the stream and south of the village of Nsllagunta. 
Metamorphics make their appearance in the Nandi stream nearly due east of this village. 
No sandstone whatever is seen in place between the Nandi stream and the Ganar, but 
metamorpkic rocks crop out to the north. Two boreholes put down north of the village, of 
Ganara entered quicksands at depths of 34 and 22 feet respectively, and it was found 
impracticable, after sinking in the first instance through 18 feet, and in ihe second through 
24 feet of loose sand and water, to penetrate to the rock. In the GanarVagu Damudas are 
seen in two or three places about half to three quarters of a mile from the mouth, and in a 
boiing at one of these coal was discovered (see Records, 1871, pp. 61-62). Above this 
metamorphics appear, but still further north Talchirs are met with, and extend north for 
about a mile towards the villages of Malipur and Kishtaram. They are almost, if not 
entirely, separated from the Damudas, metamorphics intervening not only in the stream, but 
to the east of it, while to the west the surface is much covered by alluvium. 
West of the Ganar stream sandstone is exposed in several places near' ihe village of 
Tatpali and south of Egerpeta, but the dip is obscure. Apparently it is to the south, 
and the borings put down south of Tatpali appear to indicate that it is very slight. But at 
one spot, at a tank almost due south of Egerpeta and north-west of Golagddem, sandstone 
is seen dipping to the north-east at 60,° proving the existence cither of faulting or of great local 
disturbance. Prom this place little, if anything, is seen to the westward as far as Goguleaka. 
In a field close to Egerpeta some Talchir shales were found, but none could be detected thence 
to the westward till about half a mile east of Glmtipar, where they are exposed along the boun¬ 
dary for a short distance, and are well seen in a small nala, all in thick jungle. 
The hills near Deorpali consist entirely of' grit or conglomerate, and no shale is seen in the 
section exposed in the river. It appears most probable that the rocks belong to the KarntM 
group. Whether a fault, in continuation of the boundary south of Madavaram, runs up the 
river, separating these rocks from those of Amravaram, is doubtful. Even if such be the case, 
it may be of older date than the Kamthis, which here, as near Lingala, appear to be proved by 
their distribution to he quite miconformable to the Damudas. 
* Vagu, Telinga for stream, equivalent to Nadi in Hindustani. 
