144 NERBUDDA DISTRICT. 



A Section perfectly analogous though not identical with this, may 



„ „. , be seen between Rewah and Myher, in Sirbo Hill 

 Lower beds of Sirbo 



Hill. before mentioned ; though probably belonging to 



a different part of the Vindhyan series, this Sirbo Hill section looks like 



a repetition of the Kuttra Ghat one. 



In the bank of the Sonar, south of Sagur, a considerable thickness 



of oreen shale and earthy flagstones is found, 

 Lower beds of Sonar & so 



section, underlying the tabular masses of the Vindhyan 



Sandstone. 



Again in the Nerbudda valley itself, similar shale beds appear more than 

 once, where the Vindhvan sandstones have been 



Same section repeated * " 



near Silwani & Sirmow. denuded in those bay like curves, which stretch 



back north of the straight line of their general faulted boundary : they 



may be well seen near Silwani, and Sirmow, and thence to the east and 



south down to near Birman Ghat on the Nerbud- 

 Resume. 



da. Thus then it appears that the sandstones of 



the Vindhyan series are associated with a considerable thickness of 

 shales which are seen to accompany them in several parts of their area, 

 and at points widely separated from each other. At Bilohi and Kuttra 

 (above mentioned) this shale group is found to be mixed with a consi- 

 derable thickness of siliceous bands ; thin layers of quartzite, little vein- 

 like beds of quartz, and earthy flags, go in the aggregate to make up 

 a large part of the mass. At Sirbo, on the contrary, the whole is argillace- 

 ous, and the pure earthy green shale is seldom interrupted by siliceous 

 layers ; but in the Sonar, south of Sagur, and still farther south the mixed 

 character re-appears. 



When speaking of the group of rocks called provisionally Sub-Kymore, 



Analogiesofthesebeds We haVe Stated that in the section near the villa § e 



with the Sub-Kymore. f Pullassi, (page 139, ante,) a considerable thickness 

 of indurated shales, and thin-bedded quartzite, with micaceous layers, 

 and much finely marked rippling, is found just below the undoubted 



