MALLET, VTNDHYAN SERIES. 35 



red ochreous clay. la the Coorani stream this same rock is the first to 

 show within 30 yards of the slates. 



At Murye south-east of Ramnuggur, and again about the Sone, 

 a limestone is met with which most probably should be referred in posi- 

 tion to that we are now discussing, though here again there is some 

 imcertainty whether it may not rather belong to the older series. Such, 

 uncertainty, however, can hardly be said to exist regarding the limestone 

 at Koteesar on the Mahanuddy. This rock occurs in enormously massive 

 beds, yet its whole superficial extent is only a few square miles. The 

 occurrence, a short way up stream, of porcellanic beds, to all appearance 

 overlying the limestone, strongly corroborates the opinion that the latter 

 should be classed with the limestone of the Rehund. 



There is much to suggest that, in many places, this rock is not sub- 

 sequent, but equivalent to, and replaces the bottom conglomeritic sand- 

 stone ; and it has been frequently observed that when one rock is thickest, 

 the other is thinnest. Near Agoree they seem to pass into each other 

 laterally. It would seem as if the present surface of the schist area 

 approximately corresponds to the surface on which the bottom Vindhyan 

 beds were deposited ; that then, as now, it was relatively a more elevated 

 area, and that upon it irregular accumulations of sand and conglomerate 

 were laid down ; while synchronously, upon and around this area, perhaps 

 in deeper or more sheltered spots, the massive limestone was formed. The 

 much greater thickness of the sandstone found in the outliers to the 

 south, than in the band out-cropping at a lower level along the edge 

 of the main area, suggests the complete and general absence of this band 

 beiieath that area. 



In the Khone Khas region the limestone No. 2 passes above into the 



3, 4, 5. Porcellanic and ^°^^ ^^ ^^^^^ *^e term ^ porcellanic ^ has been 

 trappoid beds. appHed. The latter occurs in beds from 2 to 



3 feet thick, of a greyish color, and breaking with a splintery fracture. 

 E . ( 35 ) 



