SEC. 10.] . NOUTH-WESTEEN KUTCH. 261 



The succeeding lateritic group, presenting, as usual, various incon- 

 stant characteristics, overlaps the trap and rests directly upon the 

 Jurassic rocks below with almost undisturbed but unconformable suc- 

 cession, while at one place a fault causes rocks of both of .these 

 groups to abut against the trap. 



The decomposed state of some of the trap flows, the soft nature 



„ , . „ of the frequently volcanic-looking sub-nummu- 



Kelations of groups. ^ ^ o 



litic rocks, and the similarity between certain 

 of their beds and Jurassic sandstones, occasionally obscure the relation- 

 ship between these different groups ; their general mode of arrangement 

 will, however, be understood from the annexed sketch plan and sections. 

 (Plate VI). 



The Jurassic rocks north of the valley (No. 1, Section A B) 



consist of coarse, ferruginous, white and conslo- 



Sections. ° 



meratic sandstones with bands of soft shale. 

 They are nearly horizontal upon the conspicuous elevation called Jagora 

 hill, which is capped by strong silicious beds of close texture resembling 

 quartzite, and just to the southwards are traversed by a thick 'reeP 

 of the same silicious character. On some ridgy and broken hilly ground 

 between this and the Mhurr valley they dip south at 15° and 20° 

 beneath the traps, and at one place a thin layer of trappean ash was 

 observed between the beds. 



The interrupted silicious band of Jagora descending with the dip 

 sheets some broken ground south-west of the hill, and a small peak 

 near the letter E, is formed of a dark liver-coloured variety of these beds 

 with scattered grains of white quartz (used for mill-stones) . 



Eugged hilly ground formed of these upper Jurassic rocks (oc- 

 casionally crossed by reefs) extends, with the usual low southerly and 

 south-westerly dips, along the basal margin of the traps from this 

 to Kora. 



( 261 ) 



