92 ball: geology of aueunga and hutar coal fields. 



really be continuous. A well marked line of green trees was seen to 

 stretch westwards, with a slope of about 5°, from a point apparently at 

 the level of the top beds of the Talchirs in the Kande hill, down to 

 the level of the Dauri valley. This line of green trees evidently 

 marked the position of an impervious stratum which arrested moisture — 

 in all probability a Talchir shale. 



In the Dauri section from 80 to 100 feet of Talchirs are seen rest- 

 ing naturally on the gneiss, a small outlying 

 patch also occurring south of the main boundary. 

 The bed immediately overlying the Talchirs in this section consists 

 of a highly ferruginous sandstone which one might hesitate to include 

 with Barakars were it not that it is associated with some small coal 

 seams and other normal Barakar rocks. 



Beyond the Dauri the Talchirs are traceable for about a mile, after 

 which they are overlapped, for it does not seem probable that the 

 boundary which strikes south-south-west past 

 Morwaie is a faulted one. 



From Kande westwards, along the northern boundary of the field, 



the marginal zone is traceable as a narrow strip, 



with perhaps one short interval, up to Ookamand. 



Beyond the village it spreads out suddenly, and the shales, which there 



thicken considerably, are spread over about half a square mile of ground. 



Again it narrows, and at Lohoor is overlapped completely. In this 



neighbourhood there is a trap dyke which traverses 

 Trap dyke. , . . , . , 



the metamorphics with an irregular course. 



In the sections of this dyke which are exposed in the Teorohee Nadi at 



Kochilah and Ledgain small patches of Talchir shales are seen, which 



have been conserved from erosion by the protecting influence of the trap. 



West of Lohoor the zone spreads abruptly to a width of a mile, 

 and in the Dauri there is a considerable section 



Thickness. 



in which a thickness of possibly 300 feet is 

 exposed. 

 ( 92 ) 



