54^ BALL: GEOLOGY OF AURUNGA AND HUTAR COAL FIELDS. 



I have already given my reasons for believing that the fracture took 

 place before the deposition of the Barakar rocks. 



The next example of this system runs between Putkee and Antekhita, 

 forming the boundary at the extreme north-west prolongation of the 

 field. The fractured junctions between the Barakars and gneiss in the 

 Aurunga section clearly indicate the faulted character o£ this boundary. 

 The strike is 20° north of east to 20° south of west. 



The last representative of this system which has yet been proved forms 

 the north-west boundary of the Hutar field, and is_, it is believed, continuous 

 with the line of fracture marked by fault rock, wherefrom the Tatapani 

 hot springs take their rise. Where it forms the boundary of the field its 

 faulted character is clearly indicated by the fractured junctions and cut- 

 off patches in a series of cross-sections which are yielded by streams ; 

 its strike falls from 25° to 21°, north of east and south of west. There 

 is nothing to indicate its relative age. 



3. Worth of west to south of east system. 



The first example of this system is the already described fault which 

 bisects the Aurunga field. Its strike between Obur and Rukhant is 

 from 47^ north of west to 47'' south of east. At Obur it is deflected 

 about 17°, so that the direction between Jarum and Obur is from 30° 

 north of west to 30° east of south. 



The next of this system is the one which runs from Putkee to 

 Latiahar ; at several points it touches the bends of the Aurunga tangen- 

 tially, and its faulted character is clearly apparent ; its strike is 27° to 

 22°, north of west and south of east. 



The last fault of this system is the well-marked one which forms 

 the terminal western boundary of the Hutar field. Its strike is unusual, 

 being 60° north of west and south of east. Properly speaking, perhaps, 

 it ought to be classed by itself. From what I have seen of the meta- 

 morphic rocks I fully anticipate that their detailed examination will 

 result in the discovery of other lines of fracture, having strikes referable 

 to the above systems. 

 ( 54 ) 



