452 PREHISTORIC EUROPE. 



3. Marine deposits: submergence of land to a depth of 25 feet or 



thereabout below its present level. 



4. Lacustrine deposits, and Upper Buried Forest : re - emergence of 



land ; wide shallow lakes ; great forest-growth ; climate genial. 



5. Upper Peat, and Lacustrine deposits : conditions unfavourable to 



forest-growth ; climate probably like that of No. 2. 



6. Marine deposits of present coast : recent advance of the sea. 



Now, compare with this the succession met with in Corn- 

 wall, which may be taken as follows : — 



1 . Lower Buried Forest : greater extent of land than now ; climate 



genial. 



2. Lower Peat : conditions unfavourable to forest-growth ; climate 



probably more humid than that of No. 1. 



3. Marine and Estuarine dep>osits : submergence of land to a depth of 



50 or 60 feet or so below its present level. 



4. Upper layers of trees with roots, in stream-tin sections, and submerged 



forest-bed of coast : re-emergence of the land ; considerable forest- 

 growth ; climate genial. 



5. Upper Peat and drifted wood, in estuarine deposits : decay of trees ; 



climate probably more humid than that of No. 4. 



6. Marine deposits of present coast : recent advance of the sea. 



The beds of the broad Fenland may be similarly arranged thus : — 



1 . Lowest Buried Forest : land more extensive than now ; climate 



genial. 



2. Lowest Peat : decay of forests ; humid conditions. 



3. Marine Deposits : submergence of the land to a depth of 30 feet or 



so below its present level. 



4. Second Buried Forest (probably also submarine forests of Hunstanton, 



Skegness, etc.) : re-emergence of land ; return of genial climate. 



5. Upper Peat : decay of second forest ; humid conditions. 



6. Marine Deposits, Peat, Shell-marl, and Newer Forest-beds : recent 



submergence of the land ; shallow lakes ; humid conditions giving 

 rise to growth of peat ; now and again small trees make their 

 appearance in such parts of the Fenland as become sufficiently 

 dry ; the area of land slowly increasing, owing to marginal 

 accumulations of marine silt. 



Since the Postglacial and Eecent deposits of these separate 

 districts agree so closely, the conviction is forced upon us that 

 such close parallelism cannot be the result of mere local circum- 



