1876.1877.] 



26l 



France 



England 



R. TATE 



C. BARROIS 



W. GAULT 









UPPERMOST 

 CHALK 



Zone of 























Wh I TE 



Belemnitelles 



Zone of 





t/i 







E 



a 



Chalk 



Zone of 



Belemnitelles 



p4 W 



2 











Chloritic 



Marsupites 



Zone of 



& u 



g 



W 



g 



Chalk 



Zone of 



Marsupites 





3 



o 



fcH 





Micrasters 





Pi w 





w 



O 







Zone of 



£ 3 



H 



O 



> 





Absent 



Absent 



Micrasters 



H 



Z 



g 





Zone of 



Zone of 



Zone of 



bd 1 





r 1 



Exogyra 



Holaster 



Inoceramus 







r 



COLUMBA 



Planos 



Crispi 



U ^ 









Zone of 



Zone of 



(Unconformity) 





Zone of 











Inoceramus 



Terebratulina 



O S T R E A 











Crispi 



Gracilis 



COLUMBA 



Q 







O 











* 5 



H 

 O 







Zone of 



Zone of 



Zone of 



W 00 



w 



S T R E A 



Holaster 



Holaster 







52 



CO 



> 





Carinata 



Sub-Globosus 



Sub-Globosus 





g 



2! 



g 









O 



4 









Zone of 



Exogyra 



Conica 



Zone of 

 Pecten Asper 



Zone of 

 Pecten Asper 









Our Irish Cretaceous strata have suffered great denudation, 

 and have been subjected to many viscissitudes which the English 

 and Continental strata never had to endure. That they formerly 

 extended further north to the Western Highlands of Scotland we 

 have evidence of in the remnants of Cretaceous beds still found 

 there, and which the reader has himself seen. They were probably 

 continuous along the great Cretaceous basin of the north — with the 

 Chalk of Sweden — and, doubtless, continued round the flanks of 



