Development of the Vegetation of New York State 95 
MF Bf Bs,Bm 
5 ° a a Sty = ; eee ° - J 
: st Oe : pi eS : - a ee Oper 
| aie oe eae te a EOCENE D Op abate sen aed ara nae Pe Aas 
—__+ 2s on = e g 1. ONaeits wns a ae eg Ne | 
Reproduced by permission from Geol. Survey of Ohio bulletin 16. 
Fig. 9. Diagram illustrating stages in the origin of peat and marl deposits in 
lakes. The several plant associations of the Bog series, displacing one another, 
belong to the following major groups:— (1) O. W.— open water succession; 
(2) M.— marginal succession; (3) S.— shore succession; (4) B.— bog succession, 
comprising the bog meadow (B. m), bog shrub (B. s) and bog forest (B. f.); 
and (5) M. F.— mesophytic forest succession. 
