GENERAL GEOLOGY OF THE AREA. 



25 



that the traps^ many of them very narrow, along the great east-20'- 

 north to west- 20"- south fault along the Iria nullah are dykes erupted 

 along the fault ; also the east-west dykes which run nearly parallel from 

 near the Banki nullah westwards are clearly along lines of fault. 

 This is Especially well seen near the contact of Mahadevas and Barakars 

 of the Pipra hill, which is faulted, the lower beds of the former dis- 

 appearing towards the east against the Barakars, and apparently dipping 

 below them. The long dyke south of that locaHty, which at first runs 

 nearly east and west, turns sharp round to the south-west near Maihewa, 

 near which village the trap has intruded between beds of Barakars later- 

 ally and still connected with the dyke. 



A similar example of intrusive trap was found in the Dhursot nullah 

 (Bar river), where a north-west to south-east dyke, about 8 feet thick, 

 has penetrated right and left into joints of the Mahadevas, forming veins 

 of only a few inches thickness and conforming exactly to the surfaces 

 of the joints, filling up every crevice in the sandstone, as shown in the 

 accompanying fig. 2 : — 



Fig. 2. Trap dvke, ftllinj? up joints in Mahadera sandstone north of Khord, in the Dhursot nilllnh, 



( 153 ) 



