20 ramgurU coal field. 



///. N oriJi-North-West and l^outh-SoutJi-East faults. 



The pair of faults which have thrown the Bardkars south of Soogea 

 are examples of this system. Its period was subsequent to that of 

 No. I. 



Fault Rock. — Without any exception the faults of this area 

 whether in the sedimentary or metamorphic rocks are, at least in 

 portions of their extent, accompanied by fault-rock. 



This rock is divisible into three principal varieties ; 



1. Pseudoinorpliic qtiai-tz, 



2. Brecciated quartz. 



3. Horn stone. 



TsetidomofjiJiic quartz. The most abundant form of this variety of 

 fault-rock consists of a series of porcelanic-looking plates ; these are 

 strongly suggestive of the well known crystals exhibited by Barytes. 

 Some of the specimens contained traces of micaceous iron ore between 

 the plates. As these two minerals not uncommonly occur in nature 

 together, it seems all the more probable that Barytes was the original 

 mineral which has been replaced by silica. The faces of these plates fre- 

 quently exhibit peculiar striations which cut one another diagonally and 

 so form series of triangles. The other form resembles closely the ordinary 

 fibrous variety of Gypsum and sometimes that of Celestine ; there can be 

 little question that these were the minerals which have been replaced by 

 silica. 



The pseudomorphic variety is best seen in the runs of fault- 

 rock which are marked on the maps in the vicinity of Oorlah and 

 Koojoo. It is also seen in the fault which runs into the field north of 

 the Damoodah at Ramgurh, and in the fault at the other side of the 

 field in the neighbourhood of Ticahara. The hills at Kurma have axes 

 formed of the same rock. In the northern one it forms a sharp ridge 

 which along the immediate line of summit is often only a few feet wide. 



( 128 ) 



