80 MALLET, VINDHYAN SERIES. 



being removed or wanting. The various members of the formation^ 



those at least which do not become extinct, thus outcrop in a series 



of concentric ovals, the central one being occupied by the upper Bundairs 



between Nursingpur and Nagode. 



In the Gwalior country the upper E-ewahs do not exceed 



150 feet in thickness, strongly contrasting in this 

 Gwalior. , , . 



particular with the immense development in 



the Nerbudda valley. 



Their next appearance is west of Agra. The celebrated remains 



at Futtipur-Sikri are buUt on a ridge of upper 

 South-west of Agra. 



Bundairs dipping south-east at 30°, about ten 

 miles north of which is a second ridge where the beds dip at 

 20°. The latter is isolated in the alluvium, which obscures all the 

 rocks between the two ridges, but the lithological characters of the 

 strata in the northern one, combined with their inclination and 

 position, can leave little doubt of their belonging to the Bewahs. 

 The same ridge is continued at Budawul, where it is much closer 

 to the Bundair, and where the strata in both dip at very high 

 angles, and is again found about half way between Byana and 

 Hindoun ; but here the dip is much lower. The upper Rewah sand- 

 stone also forms the centre of the synclinal to the south-west of 

 Kerowli. 



The mode of extension of the upper Bewahs to the west is as yet 

 uncertain, but they have been met with at Indergurh, and clearly seem 

 to be represented in the Neemuch country. 



(c.) — Bundair Group. 



The Bundair group from being the highest member of the series 

 covers probably a larger superficies than any of 

 the others. Of the region known up to the pre- 

 sent time, they occupy a very large tract from Sagar to beyond Rewah; 



( 80 ) 



