COUNTRY NORTH OF THE SON. 131 



This fault has almost died out by the time it reaches the Mohan, 

 and for a couple of miles to the west, of that 



JRed shale series. 



river the bottom conglomerates of the red shale 

 series are found, in original contact with the transitions, to the south 

 of the line of fault. In and east of the Mohan the red shale outcrop 

 attains a width of nearly three miles. The shales are largely 

 developed and might almost be called slates as they are hard enough to 

 form rounded pebbles, which are extremely abundant in all the 

 stream-beds within the area of the red shale outcrop. 



Among these shales Mr. Vredenburg found veins of barytes, from 

 an inch to over a foot in thickness, near the 



Barytes. 



village of Bharra. 



East of the Mohan the sandstone beds of this series thicken con- 

 siderably and form bold scarps overlooking the low ground round 

 Ghurder. Further east the termination of the outcrop takes the form 

 of a narrow rib of quartzite and conglomerate, dipping northwards 

 against a fault. For the last four miles of its course, before the 

 outcrop tails out, it has run clear of the lower Vindhyans. 



Among the transitions of the area under consideration there are 

 several runs of conglomerate, of which three 



Transitions. ... . . 



principal ones require special notice. 

 The first of these forms the ridge running about E. N. E.- 

 W. S. W., immediately north of the stream called Jhiria 1 on the 

 map; that which flows north of the Dadri outlier. It consists here 

 of a quartzite through which numerous pebbles of an older quartzite 

 are scattered. The transition volcanics are seen in the ground to 

 the south, but the relationship of this conglomerate to them has 

 not been made out. A similar rock, probably of the same age, is 

 found in contact with the lower Vindhyans in the stream-bed and on 

 the hill sides near Saru. No pebbles of red jasper were seen in 

 this exposure. 



1 Jhiria in the local vernacular is a generic name for a stream and is applied to innumer- 

 able streams throughout the district examined : few of these streams have any distinctive name, 

 but are called after the villages they flow through. 



K 2 ( 131 ) 



