FIGURES (Continued) 

 Number Page 



8 Typical curves of the predicted daily tide during December 

 1970 for stations on the Atlantic, Gulf of Mexico, and 



Pacific coasts of the United States 13 



9 Height of mean spring tides offshore along the Atlantic 



and Gulf of Mexico coasts of the United States 14 



10 Relation of the tide range at Boston, Masschusetts, to 



the phases of the moon over an annual cycle 14 



11 Cumulative distribution of grain size in the sediments 

 from the mouth to the head of Barnstable Harbor and 



marsh 16 



12 Elevation in tenths of feet of the high marsh surface 



relative to mean high water at Barnstable, Cape Cod 17 



13 Dark areas represent the distribution of pond holes or 

 pannes and tidal creeks on the high marsh at Barnstable, 



Cape Cod 19 



14 Surface microrelief across the transition from low to high 



marsh at Farm Creek, near New Haven, Connecticut 20 



15 Some common higher plants of the New England marshes 22 



16 Relative diversity, dominance, and major species 

 composition of vegetation zones described by Miller 

 and Egler (1950) at the Wequetequock-Pawcatuck marshes 



in Connecticut 25 



17 Generalized transect from the uplands to the low inter- 

 tidal in a "typical" New England salt marsh showing the 



common vegetation types 27 



18 Vertical distribution of roots, rhizomes, and dead matter 

 on the high marsh at Great Sippewissett Marsh on Cape 



Cod 39 



19 Amounts of aboveground vegetation and roots from April 

 through November on the high marsh at Great Sippewissett 



Marsh on Cape Cod 40 



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 43 



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