Sec. 11.] DETAILED DESCRIPTIONS. 175 



South of the Men, nearly as far as the Nerbudda, very little rock is 

 seen ; the boundary of the trap has, for the most part, to be inferred 

 from scattered fragments, or from the change in the colour of the soil. 

 Where rock is seen, it is generally some form of calcareous shale, fre- 

 quently containing oysters. Fragments of sandstone are scattered over 

 the whole country, even where the underlying rock is trap. It is probable 

 that small outliers of sandstone occur within the trap boundary, but they 

 must be of very small extent. 



Near Bhadurwa, north of Gundeshwar, there is a low ridge of gritty 



,^ ,, „^ , , sandstone, dipping at a low angle to the south. 



North of Gundeshwar. ^ o o 



To the east of this are some low ridges of slightly 

 fossiliferous limestone. Traps come in to the south upon these beds. 

 Fossiliferous strata containing shark-'s teeth are met with in the Men, 

 near the village of Dohud. 



The thickness of 'the cretaceous rocks exposed in this tract of country 



Thickness of cretaceous ^PP^^^'" ^"^^ ^'^^*®^' *^'^^ elsewhere in the lower 



*'° Nerbudda area, west of the Hoshungabad district. 



To the south, in the Deva^ a great thickness occurs (see after), but 



the base is not exposed. Owing, however, to the imperfection of the 



sections, and the great extent to which the surface of the country is 



concealed by alluvium, it is impossible to say what vertical thickness 



of rocks may exist between Wasna and Gundeshwar. Their outcrop 



extends for 8 or 9 miles ; their dip, wherever well exposed, is to the south 



and not below 6°, but local irregularities and rolling prevent even 



an approximate estimate of their thickness from being formed with any 



reasonable prospect of accuracy. 



From Barr to Wurgam, the river Nerbudda runs through a deep 



narrow channel cut in massive trap, frequently columnar, and resembling 



the thick beds at the base of the Malwa Ghats. 



Two inliers of cretaceous rocks occur in the 

 Section in Nerbudda. 



Nerbudda between Gundeshwar and Soorpan. 



Both appear to be brought up by faults. 



( 337 ) 



