SEC. 7.] THE CHARWAK AND KATROL EANGE. 179 



granular and gravelly, with a white felspathie matrix. Oblique lamina- 

 tion prevails, thick pink and yellow-striped sandstones forming the base 

 of the escarpment, while just beneath the trap is a hard bed of black 

 ferruginous conglomeratic grit, the section being somewhat similar to 

 that in the neighbourhood of Buehaoo. 



, At the eastern end of the outlier, the ground is much disturbed by 

 faults, and some small representatives of the lateritic group occur near 

 the village of Rutnal. In this neighbourhood much silicified fossil wood, 

 mostly rolled and polished, was found in the surface soil; it has probably 

 been derived from disintegration of some tertiary rocks which have dis- 

 appeared from this locality. 



Prom the small detached trap hill west of the village looking 

 towards Katrol, the faulted position of the trap is fairly seen. 



On the south side of the outlier is a rugged and irregular wall of 



' fault rock,^ marking a deflection in the srreat line 

 Fault. '^ 



of fracture north of the Katrol range, and the 

 Jurassic beds are either vertical or dipi at higher angles towards the 

 fault. 



After Katrol, Joondia and Urrooa are the two most conspicuous 

 „ . , .„ peaks in this neighbourhood. Thev are conical 



Conspicuous niUs. 



hills, situated on the axis of an anticlinal in the 

 lower Jurassic rocks. From Urrooa, the most lofty of the two, several 

 trap dykes radiate in different directions, the fissures of which are some- 

 times occupied by trap and sometimes marked by strong ridges of 

 quartzose rock, apparently altered conditions of the adjacent beds, this 

 being chiefly observed along the courses of the two large ones running 

 towards the south. In these also a triple arrangement is observed, the 

 centres being occupied by ordinary grey trap, with the soft purple lava- 

 like variety on either side probably marking later periods of eruption. 



( 179 ) 



