82 MIPDJ.KMISS: THE GBOLOGS OF IDAK BTATB. 



is apparently continued into the strike-masses of the low hills south 

 of Kalol and at Damavas (B), tliere is that of the eastern spur- 

 ia the Harnav river, which manifestly continues into the spur 

 between Chhapra and Anthra and into those forming the foot- 

 hills of the main ridge 2f miles east of Medh (C), and there 

 is lastly the strongly marked and very lofty ridge north of Chorivad 

 itself (D). These plagioclinal elements of the range as a whole 

 are grouped en echelon, and each disappears towards the south- 

 west, where it enters the plain. Of these zones, A is characterised 

 by its irregularity of dip and stoped junctions with the biotite- 

 •meiss, B is remarkable for a clear bedding-dip in places, C for its 

 obscure dip and ferruginous character at its south-western end, 

 and D for its paler tints, coarser grain and more massive character 

 with perhaps steeper bedding. 



Owin<- largely to the alluvium in this case, it is manifest that 



_ . , ... the Delhi Quartzitc of the above area is not 



Relation of quartaate "*" *• 



masses to Aravalli self-explanatory. Ihe four zones, A, B, L, I), 

 n,cks uncertain. ghow differences of colour, grain, texture and 



bedding, which suggest a stratigraphical sequence. On the other 

 hand, the superinduced structures and more especially the areas 

 of rock chaos and absence of dip might well be held to indicate 

 an abnormality far removed from what is characteristic of a 

 normal sequence. As regards their relationship to the Aravalli 

 rocks, which, with the exception of the Walren and Damavas 

 localities, are some miles apart as to their outcrops, a flat, uncon- 

 formable overlie of the Delhi quartzitc seems absolutely out of the 

 question. But as to what the steep straight A, B, C, D, elements of 

 the ridge connote, together with their disappearance from view- 

 to the south-west in the alluvial plain, no formal answer can be 

 attempted here just yet. It is only necessary now to keep in 

 mind the few known irregular stoped junctions, which have 

 already suggested a somewhat unusual explanation that will be 

 elaborated later after other areas have been described. 



The next, somewhat expanded area of the Delhi Quartzite, 

 Region between the that can bc conveniently described together, 

 Hathmati and Gthuv&i is that which, with some local interruptions, 

 nvers - sweeps south-west from a few miles N.E. 



of Mundeti town via Vasai, Munai, Man, Chhapra, Khed (or 

 Khedgal), Sabli and Jamla, and lies between the alluvial plain 

 south and east of Idar town and the course of the Hathmati river. 



