TALCIIIR SERIES. 7 



The southern boundary of the field having been formed by a fault, 

 the course of which lies through higher rocks, we do not find Talchir 

 outcrops so abundant as on the northern ; of those which do exist, the one of 

 mostinterest is found near the Poonoo and Burobing road where it crosses 

 the Damoodah. It is traversed by the fault which occupies the channel 

 of the river, and has here exercised its minimum throw. 



In the Bhera nuddee, west of the village of Peprajura, there is a 

 thickness of upwards of seventy feet of shales with a boirlder-bed at the 

 base. 



On the eastern boundary of the field a north and south fault has 

 Patch of Talchirs se- separated a patch of Talchirs from the main mass, 

 para e y a . rp^-^ pg^^^j^ would doubtless have been denuded 



away, but that a small cross fault has let it down on the north. The 

 point of junction of these two faults is marked hj an increased develop- 

 ment of fault rock which forms a small hill. 



In the Bhera and Damoodah rivers small outlying patches of silt 

 filling up cracks and hollows were observed. 



Sometimes the shales which rest immediately upon the gneiss have 

 undergone alteration, silica having rej)laced some 



Alteration of shales. £> js\ •^^ j_'j_ j n n -, 



01 the argillaceous constituents of the rock. 



In one of the sections given above, the occurrence of concretionary 

 structures was indicated. These nodules are gen- 

 erally in the form of compressed spheres formed 

 of a series of successive layers. I was unable to discover any nucleus 

 in any of those which I examined ; nor did they exhibit any trace of lime 

 on the application of acid. 



The boulder conglomerate which occurs at the base of these rocks 



has given to the series an interest in the sight of 

 Boulder conglomerate. 



all observers which it could never otherwise have 



Concretionary structures. 



( 115) 



