BARAKAR GROUP : OUTLIERS. "" 79 



From Dudwah westward the Aurunga winds to and fro across the 

 boundary, so yielding interrupted sections of sand- 



tlntS?""^* '^''*''*'' *'°°° ^*°^^^ ^^^ carbonaceous shales, which for the most 

 part dip at high angles northwards. No coal is 

 seen in this portion of the Aurunga or its tributaries. In the succeeding 

 reaches of the Aurunga up to Putkee, sandstones, with rare carbonaceous 

 shales, are the only rocks seen. At the three points, vide map, where the 

 boundary strikes the river tangentially, the sandstones are either 

 vertical or dip away at high angles. In the section west of Putkee the 

 junction is undoubtedly faulted, and some pebble-beds shew signs of 

 partial vitrification. Half a mile further on the river enters an oval tract 

 occupied by an outlying basin of Mahadevas, presently to be described ; 

 where it again passes into Barakars, it discloses a narrow zone consisting 

 of sandstones and conglomerates, with one band of carbonaceous shale, 

 which dip S.-S.-E. at angles rising from 25°, to the vertical. Although 

 it is clear that both here and on the southern margin of this basin the 

 thickness of the Barakars is reduced to 200 feet or so at the utmost, 

 none of the sections give distinct evidence of 

 ofuncoSrm%r^'*^^''''^ unconformity. In each stream, on the other hand, 

 there seems to be a steady sequence upwards from 

 the Barakar grits to the red Mahadeva sandstones. In the extreme 

 western extension of the field, white pebble conglomerates, without any 

 very distinct bedding, and forming series of low hills, prevail over every 

 other form of rock. There still remain to be described the Barakar 

 rocks of several outliers in the vicinity of this field. 



Outliers. — Four detached deposits which include Barakar rocks are 

 known to exist in the vicinity of the Aurunga 

 end of field!* north-east g^j^^ ^^ ^^^ ^^^ ^^^^ extensive, and in other 

 respects the most important of these, is situated 

 beyond the north-east end of the field, and at an elevation which must 

 average 200 feet above the level of the neighbouring portions of the 

 field south of Balu-naggar. A very complete section of this area is 

 afibrded by the stream which, starting from Buruhmoria, runs round 



( 79 ) 



