NERBUDDA DISTRICT. 139 



true metamorphic rocks and these " Sub-Kymore" beds, nor can their res- 

 pective limits be accurately laid down here, still there is a very strong pre- 

 sumption in favor of the belief that the latter rest on 



Ihese exist as a sub- r 



divlsion - the former. All along the Nerbudda valley from 



Jubbulpur west to Pullassi, nothing more of these so called Sub-Kymore 

 rocks is seen. The Vindhyans abut against the true metamorphic rocks, 

 and if the Sub-Kymore series really forms part of a geological sequence, 

 constant between the former and the latter, then the boundary fault 

 must have dropped them out of'sight, and have resulted in what now re- 

 sembles an over-lap of the Vindhyans, stretching in this place, beyond 

 the boundaries of the Sub-Kymore rocks, and abutting against the 

 metamorphic rocks beyond. 



But again about 200 miles to the west, down the Nerbudda Valley, 

 Found a ain th S s i m il ar rocks re-appear in the same position inter- 

 W ' mediate between the Vindhyan and the Metamor- 



phic rocks, in which they were found north-east of Jubbulpur, and 

 originally in Singrowlie. 



Below Hosungabad, and near where a stream called the Tawa* flows 



from the south into the Nerbudda, the little vil- 

 Pullassi section. # 



lage of Pullassi stands on the left bank of the 



latter, and close to it a remarkable section is exposed (see Fig. 18 be- 

 low). The sandstone beds of the Vindhyan escarpment are seen in 

 their usual position, but a little more disturbed than usual. Within 

 a few yards to the south of them a bed of fine sandstone stands, verti- 

 cally bedded, and with a strike parallel to the scarp. This vertical bed 

 will hereafter be shown to be a constant feature along the south bound- 

 ary of the Vindhyans. Elsewhere along that boundary line the meta- 

 morphic rocks are invariably found immediately to the south of it, 

 whereas here there is a considerable interval which is occupied by a 



* Not to be confounded with a much more important stream of the same name confluent 

 with the Nerbudda above Hosungabad. 



