5^ JONES : SOUTHERN COAL-FIELDS OF SATPURA GONDWANA BASIN* 



Talchira in the Pothia river, beyond this the quartzose rock is again 

 seen forming the boundary between the Talchirs and Barakars, and 

 eventually dying out in the Barakars north of Danwa. 



On the Lodadeo-Rawandeo ridge south of the Tawa river there is 



Lodadeo-Rawandeo a line of <l uartz vein running along the top. On 

 fault - the north side of this are Motur clays, while on 



the south side within a few yards, the green Talchir shales are seen. 

 The quartzose rock is again seen in the Phopas and Deriakho rivers, 

 but the fault is dying out here. To the east it is probably a prolonga- 

 tion of this fault, which disturbs the Sarni-Patakhera coal, and it may 

 even be prolonged as far as the disturbance by Lenia though no 

 trace of it could be found in the interval. 



The trap is found covering the faults in places, as east of the 



Faults older than trap Pench » to the sou t h of the Bhandaria stream 

 outflow ' and the dyke north of Omerdo appears to pass 



across the fault. The faulting must therefore have been subsequent 

 to the deposition of the Moturs but prior to the outpouring of the 

 trap. 



These faults where they bring the Moturs into contact with the 

 Talchirs have an immense throw in some of the cases, as in the Po- 

 thia river it must be nearly or quite 1,000 and 1,500 feet, but this is 

 merely local, as they die out rapidly to the east and west and the 

 throw may appear greater than it really is through previous overlap. 



§ 20. — Quartz veins. 

 Scattered through the area, but specially noticeable to the west, 

 are numerous quartz veins which have been several times referred to. 

 They have been formerly frequently noticed by those who have visit- 

 ed this basin. Mr. Medlicott has described them 1 : — 



"The frequent occurrence of strong and continuous quartz-veins is perhaps the 

 most peculiar feature of the southern zone of this rock- 

 basin. Along the northern margin, where the contortion 



1 Rec. Geol. Surv. India, VIII, 3, 84. 



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