UPPER G0NDW4NAS. 33 



or galls ; also highly ferruginous brown and purplish indurated clay 

 and hard sandstone, with seams and patches of grey iron-ore granules. 



At Tundkalpudi scarp itself, the strata are hard, compact, rather 

 Tundk 1 'A'b a fine-textured yellow sandstone and pebbly beds. 



The thick beds of yellow sandstone are often so 

 compact hard and vitreous that they are more like coarse jaspery beds. 

 There must be about 100 feet of these yellow beds, but they are very 

 irregular in their separate thicknesses, swelling out considerably at times 

 while they and the pebbly beds shade into each other. 



Under the yellow beds are more variegated and various sandstones, 

 with a thin band of dark-brown ferruginous sandstones the particles 

 of which are coarse and like rice grains of quartz. 



The yellow beds give a very favourite building stone in this part of 

 the country, one thick bed of 10 feet having been opened up by two 

 large quarries. 



Further south-east, the yellow beds of the Tundkalpudi scarp have 



been denuded in the Nayanapalem stream, while 

 Peddavegi beds. 



the underlying variegated beds show in better 



force ; and among these is a band of bright-red (often vermilion red 

 with occasional white and yellow blotches) fine-grained sandstones which 

 are quarried about a mile north-east of Peddavegi, and are well known all 

 over the Ellore side of the country having been largely used in the 

 canal works there. Close to the left bank of the Tammiler, fine 

 compact yellow sandstones are quarried at the village of Janampet 

 which must belong to the same group, though I think they are not 

 of the Tundkalpudi band. 



On the other side of the river, there is no further sign of any 

 Cut off at the Tain- sandstones answering to those of Tundkalpudi : 

 mil er. the change is abrupt and remarkable, to a series 



of dark-red, brown, and nearly black ferruginous conglomerates and 

 sandstones which lie directly on the gneiss and then run up to the north- 

 west as the long slopes of the low Dudugut range. 



The disappointing feature about these sandstones of the Tripati 



c ( m ) 



