14 



FOOTE ; GEOLOGICAL STRUCTURE OF THE EASTERN COAST. 



/ 



accumulations of soil and vein quartz debris 



furnished by the mica schists. Great and 



sudden changes of strike appear to indicate 



important faults, though none were actually 



traced, because the rocks are so insufficiently 



exposed. The annexed diagrammatic section 



illustrates the stratigraphy of the gneissic 



„, „ ,. rocks iust described be- 



Panrar section. " 



tween Pamur and the 

 foot of the Vellakonda range. 



Eastward of Pamur hornblendic schists 

 and true gneiss become very common, and 

 mica schists less and less common, as you 

 proceed eastwards, and the strike of the beds 

 varies greatly owing to great bends and 

 contortions. The contortions are specially 

 well seen in the quartzite ridges among 

 the Chundi (Soondy) hills and the Picherla 

 Konda. North of the Chundi hills the 

 strike of the beds is generally pretty con- 

 stant and not interrupted by many con- 

 tortions. The prevalent direction is north- 

 easterly. 



The micaceous schists in this region are, as 

 a rule, much less micaceous than those west 

 of Pamur, and they often pass into true 

 gneiss or into quartzite. 



The most important set of quartzites in 

 Picherla Konda quartz- this region are those 

 ites - forming the Picherla 



Konda, a bold ridge of hills rising on the 

 crest of the water-shed between the Man-era 

 and the Pal-era. The main ridge forms the 



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