56 ball: GEOLoaY of aurunga and hutar coal fields. 



To tlie west of this there are two short exposures of Talchir shales 

 in the bed of the river, which are interrupted by gneiss and partly over- 

 lapped by Barakars, which, farther on, completely conceal them. To the 

 east of the road-crossing- after an interval in the bed of the Sukri where 

 no rocks are exposed, and at the junction of the three streams which 

 combine to form that river, Talchir shales are again seen. In the 

 first of these streams a section of about 200 yards long is exposed. 

 The beds consist chiefly of yellow sandstones, but there are also some 

 shales ; they rest naturally on gneiss, and are covered up in the 

 next three reaches of the southernmost tributary by sandstones, which 

 gradually assume a Barakar-like aspect. Gneiss then occupies the 

 section for about a quarter of a mile, after which the section dis- 

 closes a narrow strip of Talchirs, consisting of liver-coloured shales 

 and grey sandstones, with which a boulder bed of limited extent is 

 associated. 



The total area of the Talchirs, at this north-east corner of the field 

 which are not concealed by overlapping Barakars probably does not 

 exceed a quarter of a square mile. The precise extent is uncertain, owing 

 to the boundary south of Balu-naggar being concealed by alluvium. 

 The maximum thickness of Talchirs exposed in the above sections no- 

 where amounts to 100 feet. 



Proceeding round the eastern edge of the field, in the Bagh Digwa 

 Eed clays at base of section north of Rampur, and at several of the 

 Barakars. points of junction in the Ghugree, north-west 



of Bhurla, there are red clays which may represent Talchirs ; but they 

 seem to be very intimately connected with the Barakar grits and sand- 

 stones,and are practically inseparable from them. On the south bound- 

 ary narrow marginal strips of Talchir shales and boulder bed occur 

 at the base of the sections to east and west of Mungur. Similar, but 

 less distinctly seen, exposures occur in the bed of the Aurunga between 

 Hurkha and Bishunpur. 



On the northern boundary of the field between Latiahar and Nowa- 

 dih, outside the east to west fault, there is a triangular-shaped area 

 ( 56 ) 



