ARAVALLI SYSTEM. 73 



white pyroxene rocks of this area. On the other hand, the presence 

 of a considerable amount of this mineral in the Bhetali rock, and 

 the fact that the latter is found along a line of country marked by 

 several outcrops of the ordinary white pyroxene-rock as well as 

 crystalline limestone with tremolite, ff^ t is likewise an argument 

 of some force disposing one to regard the two rocks as somehow 

 related to one another in origin. Perhaps the safest conclusion 

 to come to is that this rock represents an extreme stage of meta- 

 morphism of the same series as gave rise to the bedded pyroxene 

 rock — the whole being complicated by hybrid effects caused by 

 (perhaps) concealed pegmatites in the vicinity. 



Although belonging to another part of Idar State, it may be 



advisable to mention here another rock that 

 B&£dW& ° f has ft g*»* resemblance to the white pyroxene 



rock of Bamanvada, except that it is pale 

 grey or greenish-grey in colour. It occurs J mile south of Wasan 

 ( : ,V } 5— 12392) and g mile west of Reda (£ 7 %—£fo— 12393, 12394). 

 The neighbouring rocks are calc-gneiss, pegmatite and quartz 

 veins and a basic dyke-rock. The occurrence at Reda is as a dyke 

 or vein in the vein quartz of the 720 feet hill. \ mile west 

 of Reda. On its N.E. face and close to it, occurs some pale rose 

 quartz. The low 720 feet ridge of vein quartz (white or clear) 

 protrudes through the alluvium (see sketch text fig. 12), the pyroxene 



720 ft Hill 



Pyroxene Hoen 

 Alluvium 

 Vein quart?, 



Fig. 12. 



rock is quite unhanded and there is no association with it of beds of 

 calcite, etc., after the manner of the Bamanvada rock, nor is there any 

 microcline or other association as in the Bhetali rock. Specimen 

 N°- 3 2 7 6 7 — 3*7*8 ' s a P" r e pyroxene-rock, coarse-grained, and with only 

 a few interspaces filled with a very finely granular substance 

 (? leucoxene) and a little sphene. 



