114 



MIDDLEMISS: THE GEOLOGI OF IDAR STATE. 



about it. At one time I was inclined to put these more mineralised 



schists with the Aravallis, but the difficulties in the way of such 



an interpretation arc very great. 



Although there must be considerable variety in detail, it is 



necessary to add here that no marked beds 



No other petroiog- () f qua rtzite, no limestones and no trace of 

 ical faciea. ... , , , ■,. • 



intrusive igneous rocks have been met with m 



the area traversed by me among the Phyllite Series. 



There appear to be miles of thickness of these phyllitcs, without 

 any trace of any break in their monotonous 

 lhK ' klu>s ' regularity. It is, however, utterly impossible 



to make any more definite estimate on account of the lack of any 

 marked stratigraphical horizons that could be taken advantage of 

 in mapping them. The bedding is frequently steeply inclined and 

 even vertical, this being a real bedding as shown by interbedding 

 of varieties of rock type. But, notwithstanding this, beyond the 

 fact that they have evidently been folded and frequently loosely 

 cleaved, it is impossible to arrange the folds into any intelligible 

 series. The whole country is probably a plexus of brachy-anticlines 

 and synclines, with unknown amounts of slipping along axes and 

 pitching constantly and steeply to all degrees of steepness. The 

 only thing remaining steady is the strike, which keeps fairly 

 constant at about N.E. by N. 



There is frequently seen to be a rough uneven cleavage in addi- 

 tion to the bedding-planes, and often making 

 Divisional planes. • 1 1 1 1 -.i .1 rrti : 1 



considerable angles with them. lhis cleav- 

 age is necessarily more uneven and irregular in the more quartzose 

 bands, with the result that the rock sometimes splits up into lumps 

 with the formation of what looks something like autoclastic con- 

 glomerate, as ^'o, from near Pathipura (see text fig. 21). Thin 



Fig. 21. 



