10% c 

 0.4 g cm'^ 



I 



CM 

 I 



E 



o» 



30 r 



20 



10 







0.5% N 

 0.4 g cm"^ 



0.6 r 



80 ppm 

 0.4 g CI 



ACCRETION 



Figure 20. The accumulation of organic carbon, total nitrogen, and inorganic 

 phosphorus in the sediments of a marsh calculated for different accretion 

 rates, sediment densities, and sediment compositions (Nixon 1S8C). The upper 

 and lov/er lines represent approximately maximum and minimum estimates based 

 on the literature. 



43 



