Proc. R.I. A. 3rd. S. Vol. VII. 



^ 



REFERENCE TO COLOURING 



Tertiary tmosilii) 



Basic Rucks 



('llanalts and GabbrosJ 



Eocene 



Cretaceous 



Trias and Permian 



Claus and Sands 



Chalk 



Sandstones and Marls 



ShuUs, Grits, and Slates Carboniferous 



Limestone Carboniferous 



Sanil stones arid Slates Old Red Sandstone 



Slates and Crrits Silurian and Cambrian 



Acid lUicks (Granites, & 

 Felsitesof S.E. Ireland) Various Ages 

 (t Metainorphic Rucks 



Arax 



e 





