JURASSIC ROCKS 



COAL MEASURES 

 MILLSTONE GRIT 



CARBONIFEROUS 

 LIMESTONE 



JS S SJ SILURIAN 

 o o ojORDOVICIAN 



|c c CJCAHBRIAN 

 ARCHAEAN 

 < -VJ GRANITE 

 V^ BASIC ROCKS 



s I s s s s 

 PLATE XVI. Map of Geologica North Sheet. 



