C— GEOLOGY. 



83 



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O 'O 

 02 t. 



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ID 

 bl 

 O 



<u 

 o 



Lancastrian 



Q ^ 



fi" 





fii 



« i « - q"- 



I I I I I 



I I I I I I I 



Great, or Main 



Underset 



Middle 



y Orionastrsea level 



Simonstone 



Hardraw (of Wensleydale, 

 not Ingleborough) 



a, 



.1? 



03 



Gayle 

 Girvanella band 



C. septosa band 





5,° 



>H .S 0-1 



FiQ. 5. 



Classification of the Uppermost Avonian (calcareous phases) 



OF Yorkshire. 



g2 



