10 MIDDLEMISS : THE GEOLOGY OF IDAR STATE. 



(5) Amphibolite limestones of Kherod ; 



(G) Mundeti Series ; 



(7) Other areas of Aravalli rocks : 



(a) Bodi area. 



(b) Bamanvada-Jesangpur area. 



The general geographical distribution of this assemblage 

 of formations will be easily grasped by reference to the map. The 

 different outcrop areas all become visible here and there in the low- 

 lying tracts of country that are disposed west and south-west of 

 the rampart of the Delhi Quartzite hills ; and, whenever the 

 latter send out digitations and lobes into the low country, one or 

 more groups of the Aravallis follow round their winding base. 



(i) Calc-gneiss of Vadali, Khed Brahma and Golwara areas. 



The separate colour allotted to this formation on the map will 



show its general distribution in the western 



Distribution : surface and nor thern areas of the State, where it 



T 01 til T*(W 



appears forming slightly and rather gently 

 elevated and undulating country, consisting of rough and broken 

 hills and hillocks. These contrast sharply, on the one hand, with 

 the plain alluvial country, and on the other with the elevated 

 mountain masses of the Delhi Quartzite and the more rugged hills 

 of Idar granite. It is generally too rough for village sites or for 

 cultivation, except in the intermediate hollows, and supports only 

 grass and low scrub jungle. 



In the localities north of Yadali, at Dharol hill (5 miles N. W. 

 of Vadali), in the neighbourhood of Golwara (near the Sabarmati 

 river) and in the country lying between the Vadali exposures and 

 Khed Brahma the outcrops of the calc-gneiss are particularly broken 

 and isolated by large stretches of alluvium, whereas north of Khed 

 Brahma they close up into more connected stretches of rolling 

 country. In the former areas they frequently bear the aspect of 

 short strike-ridges and groups of ridges, more or less connected 

 together, the crests and summits of which only appear above the 

 alluvium which isolates them generally from one another and also 

 from other types of Aravalli rocks, whereas in the latter areas (N. 

 of Khed Brahma) the large expanse of calc-gneiss gives continuous 



