Strandlinje-studier. 



91 



historj^ in IVorvray. 



Peats (accord. 



to A. Blytt's 



ideal 



section). 



Immigration 



of 



Flora. 



Fauna in 

 the terraces 



Cultural 

 period. 



Duration of the period (in 

 thousands of year) 



a. accord, to 



archæolog- 



evidence. 



b. ace. to the 



size of tlie 



terraces. 



Bed« of loose 

 Sphagnum 6' 



Modern. 



Modern. 



Historic. 



Age of iron 



Stratum with 

 stumps. 



Boreal (with 

 Blytt's « sub- 

 boreal»)- 



Peat bed with 

 prostrate trunks 

 of Quercus 

 sessil. 4' 



Atlantic 

 (with «sub- 

 atlantic»). 



Ostrea &c. 



Age of 

 bronze. 



1—2 



Stratum with 

 stumps; Cory- 



lus avellana, 

 Fraxinus excels. 



(Boreal). 



Peat bed with 

 trunks of Pinus 

 sylvestris 4' 



Subarctic. 



Cardium &c 

 (= modern.) 



Stratum with 



stumps of Pinus 



sylv. 



Peat bed with 



Betula odor. 



Populustrem. 3' 



I 



Boreal. 



(Subarctic). 



Arctic. 



No shell 

 banks. 



Yoldia &c. 



Age of 

 stone. 



2—4 



5—8 



2—4 



1-9 



10—30? 



