COUNTRY NORTH OF THE SON. I2Q 



Batrani hill their thickness has caused them to form a very con- 

 spicuous exposure of a rock very similar to that of the Pabia hill. 



The red shales series lies in a synclinal, complicated by minor 

 foldings, and after about six miles from the western extremity of the 

 exposure are unconformably overlaid by the lower Vindhyans, which 

 occupy the hollow of the same synclinal, but completely overstep the 

 red shales on the north and rest in direct contact on the transition 

 schists and quartzites. 



On the south the lower Vindhyans are in natural contact with the 



Lower Vindhyan rec * sna ^ e series, a narrow strip of which is cut 



outlier - off on the' south by a fault which, for a short 



distance, cuts them out altogether and brings the lower Vindhyans 

 into direct contact with the transitions. 



The basement beds of the lower Vindhyans only attain a small 

 development in this outlier, but the form is noteworthy. Along the 

 northern boundary the lowest bed is usually a breccia of angular 

 fragments of the immediately contiguous transition rocks, a formation 

 which only differs from the talus accumulations now being formed by 

 its induration. In the neighbourhood of Tarka this is overlaid by a 

 rock with a very fine-grained siliceous matrix, through which are 

 scattered angular fragments of transition quartzites ; it is, in fact, an 

 indurated form of a deposit which is common enough along the 

 foot of hills, especially in a somewhat dry climate. 



Towards the Gopat and for about three miles to the east the 

 northern boundary of the outlier is faulted, but beyond that once 

 more becomes natural to the termination of the outcrop about two 

 miles east of Harphari. The southern boundary is not seen where it 

 crosses the Gopat, but south of Dol, where the basement bed of the 

 lower Vindhyans re-appears from under the recent deposits, the 

 boundary is one of unconformable contact with the red shale series. 

 In the Mohan the basement beds are exposed twice over, being 

 repeated by an oblique fault, and thence extend eastwards in contact 

 with the red shale series till, at their terminations, the two outcrops 

 run free of each other. 



K ( 129 ) 



