14 HUGHES : SOUTHERN COAL-FIELDS OF EEWAH GONDWANA BASIN. 



drudgery of tramping many hundreds of miles of small and large streams 

 to guard against inaccuracy as much as possible. They have heeu 

 carefully mapped on a scale of one inch to the mile, but the exigencies of 

 publication have necessitated the issue of a copy on a reduced size. 



The boundaries near Umaria are for the most part conjectural, as 

 the Talchirs are only exposed once in the Umrar 



Umaria, Mardhi. 



river, at their contact with the metamorphic 

 rocks south of Marohi, and again in the small feeders of that stream 

 east of Koilari ; and near the tank at Chandwar. The whole of the 

 remaining ground to the limit of the Barakar group is obscured by 

 alluvium. 



Between Kotalwar and Korar, where there 

 Kdrar. . .... 



is a small coal-field, there is an inlier of the 



Talchirs in the Barakars. 



In the valley of the Johilla they are again met with forming a 



distinct area. They are seen both north and south 

 Johilla valley. . . , 



of the inlier of metamorphics that extends from 



Mangthar to Ponri. Those to the south are not well exposed, but on the 

 north side they stretch from Ponri to Bara Chada. The bottom bed is a 

 fine-grained compact brownish-grey calcareous sandstone ; then above 

 comes the famous boulder-bed, the matrix consisting of greenish-grey 

 silt; the contained fragments are red binary granite, conglomeratic 

 quartzite, quartzite and green schist. The bed is quite 80 feet, if not 

 more, in thickness. To this succeed claret-coloured greyish-green and 

 yellowish silts; one or two thin boulder beds; compact slightly cal- 

 careous sandstones ; soft fine-grained, slightly pinkish and yellowish-grey 

 sandstones, with felspar decomposed, and weathering with rounded out- 

 lines ; then alternating silts and sandstones to the end of the section. 

 There might possibly be a little doubt about including as Talchirs the 

 sandstones in the long reach of the Johilla, at the eastern end of which is 

 the village of Goraia, were they seen alone ; but most characteristic 

 greyish-green splintery shales occur above them in the reach of the river 

 near Bara Chada that do away with all question as to their position. 

 The Talchirs extend only a very short distance inland from the 

 ( 150 ) 



