Peat and Marl 



353 



the conditions for incomplete decay of plants prevail; 

 and from the foregoing it will be seen that peat is n< it 

 likely to be composed of the remains of sphagnum 

 alone. The forefront of advancing shore vegetation is 

 led by a number of plants of very different character. 





Bf Bs Bm 5 M O-W 





Bf Bs.Bm 





*&&?'■' ■ • 





- - 



Fig. 210. Dachnowski's diagram illustrating three stages in the filling 

 of a pond with deposits of peat and marl. Peat is stippled; marl, 

 cross-lined. 



OW, open water; M, marginal succession; S. shore succession; B. b 



including bog meadow (Bm), bog shrub (Bs), and bog forest (Bli; MP, mesophylic 

 forest. 



