1(3 JONES : SOUTHERN COAL-FIELDS OF SATPURA GONDWANA BASIN. 



the line of the base of the hills, and where the Ghogra crosses it, 

 just by Karanji (E. Lon. 78 21'), the Talchirs lie up against the 

 edge of the metamorphics, the plane of contact sloping down at an 

 angle of 40° to the north and the Talchirs dipping steeply in the same 

 direction; again by Lonia (E. Lon. 78 17'), where the Tawa 

 river runs just north of the boundary, there is a quartz vein just inside 

 the boundary, and the junction is more abrupt than in other parts 

 of the line. This section has already been described by Mr. J. G. 

 Medlicott at page 240 of the 2nd volume of the Memoirs. Beyond 

 this, the boundary is not well exposed again till it reaches the 

 Deriakho river where it is perfectly natural, though there are several 

 veins of quartz in the vicinity. 



There is a small outlier of Talchirs to the south of the boundary 

 near this point and five other smaller ones close 

 by, only three of which are large enough to re- 

 present on the small scale map ; the dips are all low. The boundary 

 is again seen in the stream that runs into the Deriakho just below 

 Chargaon (E. Lon. 78 4'), beyond this it sweeps round to the north 

 and is well exposed in several streams. In the Phopas river where 

 it leaves the metamorphics, the Talchirs are well seen resting uncon- 

 formably on the old denuded surface. 



At the point where the Deriakho river passes for the sixth and 



last time from the metamorphics to the Talchirs, just before it joins 



the Tawa and just below its junction with the stream from Kaniwara, 



the Talchirs are seen much indurated with quartz in the bed of the 



river, and a short distance below the boundary there are two quartz 



veins, beyond which the Talchirs assume their normal appearance 



with a dip to the north of io°. In the Deriakho river just above the 



boundary there is another small outlying patch of Talchirs with a dip 



of 20 to north-west. It is impossible, thereforei 

 Boundary not faulted. .,,«,, ,. c ^ 1 , • , , 



with all these outliers ot lalchirs close to the 



boundary, that it can be a faulted one, especially when we take into 



consideration the otherwise natural condition of the junction. 



( 16 ) 



