NEEBUDDA DISTRICT. 141 



§ 4. The Vindhyan Series. 



The remarkable group of rocks which we include under the name 

 Vindhyan does not strictly belong to the subject of this report ; it will 

 be found more fully treated of in a preceding part of this volume. In 

 as much, however, as the area described in that paper, is distinct from 

 that which forms the subject of this, and as our remarks will be con- 

 fined to localities not described, and to questions not discussed else- 

 where, it may be desirable to give briefly some of the results of our 

 observations. 



The rocks of the Vindhyan series cover an immense area in Central 



India (see map PI. 111.) The great table land 

 Area. 



of Bundelkund and Malwah is mainly formed of 



them, and their southern boundary, conterminous as it is with that of 

 the table land itself, is marked, as has been stated, by one of the finest 

 Vindhyan boundaries, P h y sical features imaginable : the vast plateau ter- 

 escarpment. minates on the south in a line of escarpment 



which, stretching from east to west (or more correctly E. 15° N.). forms 

 the north side of the Nerbudda valley, and farther on towards the east 

 holds a similar position in that of the Sone river. Across the hich 

 ground of the Jubbulpur district flying between the valleys of the 

 Nerbudda and the Sone) the prolongation of the line of the Vindhyan 

 boundary, although still clearly indicated in the form of the ground, 



Escarpment locally is vei T much less prominently and distinctly 

 absent. marked. 



We shall hereafter have occasion to enter fully on the question of the 

 stratigraphy of the formation ; so that it will be sufficient here to note, 

 that a slight undulating dip is the rule, so slight as to leave most com- 

 monly an impression of general horizontality, in spite of great disturb- 

 ances which have locally affected the rocks along their south boundary. 



The prevalence of regularly bedded fine grained grits with a char- 



