TIIK KOCKXK SKIMKS 



age of this vent carries witli it the determination of the age of all 

 tin- a in 'iatt-d eruptive rocks. There can now be no room to 

 doubt that the granites, quartz-porphyries, felsites, pitchstones, 

 di<>ritr-, diabases, and basalts are all a connected series of eruptive 

 s, coeval with the similar assemblages in Antrim, the Inner 

 Hi-brides, and St. Kilda." 



D. CONTINENTAL EQUIVALENTS 



The Eocene area of Belgium may be regarded as a continuation 

 of the London basin, for the two are doubtless in actual connection 

 beneath the North Sea. Again, the deposits of the Paris basin 

 pn-M-iit such a great resemblance to those of the Hampshire basin 

 that they can be correlated without much difficulty, and were 

 doubtless formed within the same area of deposition. In the south 

 of France, however, and in the south of Europe generally, the 

 Eocene Series exhibits a very different facies, consisting largely of 

 hard foraminiferal limestones full of Nummulites, Operculina, and 

 Alveolina, and generally known as Nummulite limestones ; with 

 iln-si- are calcareous sandstones containing many large shells, reef- 

 building corals, and Echinoderms of many species. 



The accompanying table shows the divisions recognised in the 

 Eocene Series of Belgium and France, and their correlation with 

 those of England. 



82 



5' 

 SS- 



3 



