QuartJQurnGeolSoc.Vol.XLVl. PlXVl 



REFERENCES. 



HIGHER CAMBRIAN 



QUARTZITE 



CAMBRIAN GRIT 





HARD PURPLE SLATE P 



CAMBRIAN CONGLOMERATE 



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PURPLE SLATE 



HARD GREYWACKE 



BANDED GROUP 



DARK THIN SHALE fMs'^ DARK ALTERED SHALE 



VOLCANIC ACID ROCKS 



LiJL'jii 





IVVVVVI 



HOLOCRYSTALLINE ACID |/VVVVj VOLCANtC BASIC ROCKS 



CRYSTALLINE BASIC 



19778 FREOXDANGERFIELD, LITH LONDOM 



