92 MIDDLEMISS: THE GEOLOGY OF IDAR STATE. 



through by superinduced planes of platy structure, which are 

 not evidently coincident with anything that could be construed as 

 original planes of sedimentation. 



We now leave the broader areas of the Delhi Quartzite. The 

 XT , M „ first of the narrower areas taken here for 



Narrow outcrops on 



east bank of Hath- description starts at the north-eastern end of 

 matl the expanded area just described near Bebar 



and Sobheda, and proceeds along the left or east side of the 

 Hathmati valley. The change is sufficiently abrupt and noticeable 

 to arrest the attention, but I shall defer any conclusions that may 

 be drawn as to the meaning of it for the present. One remark, 

 however, may be made advantageously here. The long, narrow 

 ridge of 900 to 1,000 feet elevation, stretching from Bebar and 

 Sobheda as far as Meru, is flanked on the east by a wide, open 

 plain, among which have already been described (pp. 63 — 74) 

 numerous examples of the Aravalli rocks — the nearest points being 

 those round about .Jesangpur although well-sections in Bhetali 

 village, close up under the quartzite, also expose the same. On 

 the other side it is flanked by the unbroken alluvium of the Hathmati 

 river. There is good reason, however, for supposing that the 

 Phyllite Series, which is strongly represented a few miles further 

 up the Hathmati valley at J alia and Kanadara, must continue 

 below the alluvium of this part. A confirmation of this is found 

 in well-sections at Bhutavada, where phyllites are seen. There 

 is, therefore, not room in the cross-section near Bhetali for any 

 very great increase in the width of the Delhi Quartzite outcrop 

 beyond and above that exposed in the narrow ridge. This tends to 

 confirm the conviction expressed at the beginning of this section 

 (p. 77) that the Delhi Quartzite ridges correspond roughly to the 

 actual outcrops of such rock beneath the alluvium. 



The quartzite of this ridge at the gap near Sobheda is in the 



form of a great wall-like mass, striking N.E. 



Sobheda and byN ^ ^^ w | jafe appears to b e a vertical 



Bhetali. • l L 



dip. This is rendered the more probable 

 from the excellent sections exposed further on at Modhri and Bhetali, 

 where (in the latter case) an elaborate road cutting has laid bare 

 the quartzite in an exposure the like of which is rare in Idar away 

 from the railway. Although the bulk of the rock is quartzite, there 

 are numerous bands of interbedded phyllites giving a plainly seen 



