THE GNEISSIC SERIES. 25 



Saidapuram strata is broken, for to the north of this line the grey 

 gneisses are found more to the westward running close up alongside the 

 talus of quartzite debris below the Veligondas and so filling up most of 

 the narrow valley extending north from Rapui to the Penner, while the 

 schistose belt of gneisses next to be described has also been thrown more 

 to the westward. 



The Schistose Gneisses. 



A tolerably close boundary can be drawn between this group and 

 the massive gneisses from the southern edge of the area up to 

 Kaptir, but thence to the Penner the junction is covered up or ob- 

 scured,, the transition series likewise coming into juxta-position with it, 

 while both are so crushed and metamorphosed that it is extremely diffi- 

 cult, if not quite impossible, to say exactly to what series they belong, 

 and it is clear that both have been contemporaneously altered. 



At this boundary the lie of the schistose gneisses is with that of 

 the Massive Series, namely, with a high dip to the 

 eastward and having a general north-north-west to 

 south-south-east strike; but after a short distance eastward the dip 

 is soon reversed, and nearly all over the rest of the crystalline area the 

 beds are dipping westward at generally high angles or are vertical, 

 while the strike becomes more due north and south and is only in very 

 rare cases ever to the east of north. 



This sub-division consists in great part of hornblendic, micaceous, 



taleose, or chloritic schists, or well-foliated or 



laminated and more massive gneisses with varying 



proportions of quartz, felspar, hornblende, and mica ; while there are 



very many subordinate beds of laminated quartz-rock or quartz-schist 



approaching very closely to detrital quartzites. 



A fairly distinct band of more eminently schistose rock occupies the 

 An eminently schistose western edge of the field, the schists being taleose, 

 band * chloritic, and micaceous, with frequent intercala- 



tions of hornblendic bands, throughout which is disseminated a tremen- 



( 1?3 ) 



