FIGURES. 



1. Diagram of Wadden Sea environments 12 



2. Contact of two series of deposits formed in tidal flat 

 environment. 13 



3. Cross sections at right angles to the Dutch coast ... .14 



4. Simplified diagram of supposed stages of Holocene coastal 

 evolution in the Netherlands 15 



5. Cumulative curve showing areas lying below depths indicated 

 on vertical axis, in part of Wadden Sea drained by ebb currents 

 through a single tidal inlet (the "Borndiep" inlet) 16 



6. Hypothetical formation of a barrier island 19 



7. Aerial photograph of a drainage pattern in a salt marsh near 

 Sapelo Island 23 



8. The Barnstable Marsh - semi -diagrammatic 40 



9. Development of marsh with rising sea level and continued 

 sedimentation - hypothetical 41 



10. Section across marsh at widest part 41 



11. Stages in development of marsh at extremity of sand spit. . . 41 



12. Stages in development of intertidal islands of marsh on sand 

 flats 41 



13. Pattern of isotherms resulting from damped thermal wave. . 78 



14. Distribution of temperature in depth at successive times 

 resulting from damped thermal wave 78 



15. Distribution of chloride in Barnstable salt marsh . . . .78 



16. Energy flow diagram for Sapelo Island salt marsh . . . .102 



Vll 



