1916.] 



THE PLEISTOCENE PERIOD. 



349 



TABLE 

 OF THE ELEVATIONS OF THE LOWER RAISED BEACHES 

 SHOWING HOW THEY MERGE. 

 Beach. 



MontCuet 



Fort Le Marchant 



Grand Rocques 



L'Ancresse Bay 



Grand Rocques 



Moulin Huet Cave 



Fermain Cliff, East 



„ „ South 



Moulin Huet, Cliff 



Grand Rocques, Butts 



LTslet Quarry 



Mont Cuet, Courtil Bas 



Miellette Lane 



Hill 



Grand Maison Quarry 



Noirmont 



Hougue Noirmont 



La Moye Lane 



Capelles Quarry 



La Hure 



Mean of 4 estimated 



Rouvets 



Mont Cuet, High Level 



There are many patches which have not been levelled, 

 but they range themselves within one of the four series 

 shown. 



If we admit the Jersey levels, which in some cases are 

 intermediate, we find that there is a regular advance in eleva- 

 tion which forces the conviction that they arise from a 

 progressive rise of the sea. 



RAISED BEACH PERIOD. 



When I describe the connecting links between the above 

 deposits, it will, I think, be seen how I have arrived at the 

 conclusion that the beaches have been laid down in the order 

 of their elevation and that they are deposits of the same geo- 

 logical period. 



I consider that in Guernsey the beaches represent 

 (with interruptions) a progressive and fairly rapid rise of the 

 sea-level. 



I have said that there were interruptions, but I admit that 

 it requires years of study to realise them. I shall try to 

 explain how they may be read. 



Feet. 



Mean Height 



23-2 ' 





234 





24-3 





24-5 





24-8 





25-0 



. ... 25-5 



25-6 





25-9 





26-0 





26-3 





26-6 





29-6 J 





32-6 ) 

 35-5 



- ... 34-1 



46-1^ 





54-0 





54-9 



- ... 53-4 



55-2 





56*7 





65-0' 





70-0 

 75-0 



1 



I ... 70-2 



1 



75-a 





