1916.] 



THE NEOLITHIC PERIOD. 



401 



dolmen. I further found that this author describes sands in 

 Cornwall at the same height above the sea and plainly speaks 

 of the last elevation of land occurring about 3,500 to 4,000 

 years ago : the timing being possible by the associated mine 

 debris of the early workers of the tin mines. 



After thus establishing the fact of the subsidence and 

 bringing the facts before Mr. Sinel, he at once said that the 

 Jersey Tunnel street section showed the same fact. 



I now have to show that the full confirmation comes to 

 us from the newly opened peat deposit at Yazon. Here the 

 peat of the forest is 12 to 13 feet thick, and over the peat is a 

 deposit of sea sand 3 feet in thickness (See diagram No. 9). 

 That deposit, had I known it at first, would have given me 

 the confidence I lacked, for it is in turn covered by the peat 

 of the historical marsh. 



THE PEAT DEPOSITS. 



As the peat may be supposed to cover most if not all the 

 Neolithic period as far as Guernsey is concerned, it will be in 

 order for me to give a short description of the extent and 

 characteristics of the deposit. 



Diagram No. 14. 

 Guernsey. Jersey. 



4 -- 



Mil 



* \> U 1 L> 



ntf 



"• • i> ir i*' 



£7/ 



■#- w — tl—O—W—W 



-«T" — « O " 



A Recent alluvial soil. 

 B Upper Peat Bed. 



• C Marine Deposit. 



D Lower Peat, 



E Marine gravel, &c. 



F Clay with stone fragments. 



G Firm clay. 



