LAMETA. 87 



Section X. — Lameta Group. 

 Resting" upon the Kamthis in the northern portions of the field, on 

 either side of the Ward ha, and almost invariably accompanied by over- 

 lying- trap, is a series of beds consisting of clays, sandstones and lime- 

 stones, which have been determined as of Lameta age. 



There is not a single clear section of these rocks in any part of the 

 field, and the limits of the large area shown in the Chanda district ex- 

 tending" from Khemji to Panchgaon have been arrived at by framing a 

 few isolated patches. At Pisdura the section is very obscure, and the same 

 remark applies to Dongargaon and Jamgaon — all three fossil localities. 



The clays are usually greenish, or some shade of red, and resemble 

 very closely those of the Kota-Maleri group. They 

 form a continuous portion of the series. 



The sandstones ' as a rule are marly, somewhat loose, greenish or 

 purplish-white in color, and occur in beds vary- 

 ing from 2 to 3 feet in thickness. An exception 

 to this variety is a rock having a partially vitreous appearance on its 

 fractured surface, slightly calcareous, and rough externally. It is diffi- 

 cult at first sight to distinguish it from the sub-recent sandstones, and 

 had I not met with it, accompanied by characteristic Lameta limestone 

 I should probably have mapped isolated outcrops as such. 



After examining many specimens of it however, I found that small 

 particles of red felspar, were distinctive of the older rock, and that 

 their absence and the presence of comminuted fragments of trap were 

 distinctive of the newer sandstone. 



The limestones are occasionally very pure, but more frequently they 



contain distinguishable particles of silicious mat- 

 Limestones. 



ter, and lenticular plates of segregated chert. 

 These are the characteristic rocks by which the identity of the group 



( 87 ) 



