OTHER FORMATIONS. 67 



obscured by a sandy alluvial soil, in which is dug the bowry showing 

 the sandstones. 



" In pieces of ferruginous sandstones in the tauk-bund of Cotapali, 

 I found specimens of plants [Taniopteris and grassy stems) but I could 

 not trace the rock with certainty to its site. The stone, however, was 

 said to have been brought from the north near Peddawaram, and I 

 have little doubt that it was so, as it would be the most convenient place 

 from which to obtain the stone/' 



This Peddawaram patch is referred to by Mr. Foote in his memoir 1 

 on the Kistna district as belonging to his Kundakur group of the 

 Kajmahal outliers ; and it is quite evident that the areas just described 

 must be considered as belonging to the same group. 



(2). — CUDDALORE SANDSTONES. 



The belt of rocks belonging to this group extending along the Nellore 

 coast is to all appearance rather one of laterite and lateritic deposits than 

 a set of sandstones answering to those near Cuddalore and Pondicherry, 

 to which Mr. H. F. Blanford gave the name of the group. However, 

 in the many wells sunk in it and at certain points along the western 

 edo-e there is no doubt of the existence of similar sandstones ; and as 

 in the Tanjore, Trichinopoly, Cuddalore, and Madras areas no fair sepa- 

 ration of the lateritic part of the outcrops from the arenaceous portion 

 has yet been discriminated, I take it that these plateaus of the Nellore 

 district are still essentially of Cuddalore grits, though they are undoubt- 



Difficulty in distin- edly in places overlaid by a skin of lateritic brec- 

 guishing them from the . 

 lateritic deposits. cias and conglomerates which must be considered 



as belonging to comparatively recent deposits, or to Mr. Footers group of 

 " Lateritic deposits." At the same time it is necessary to state that I do 

 not (nor indeed did Oldham) go with Mr. Foote altogether in his dis- 

 crimination of these deposits, as will be seen on a comparison of the 

 map of this memoir with his map of the adjacent Nellore and Kistnah 

 area, wherein he does not show any Cuddalore sandstones at the southern 

 edge near Ramiapatnam. We carried these rocks from the Red Hills of 



1 Spura, pt. 1, p. 52. 



( 175 ) 



