BARRIER ISLAND 



Back Barrier Dune 



Lagoon Marsh Flat 



Foreshore/Beach 



Shoreface 



STRAND PLAIN 



Older 

 Beach Ridges 



Marsh 



Beach Ridge/ 

 Dune 



Forshore/Beach 



Shelf 



TIDAL FLAT 



Salt Marsh 



Tidal Mud 



Flat Tidal Sand Flat 



Figure 3. Surface and subsurface environments and variations of barrier islands, strand 

 plain coasts, and tidal flats 



Chapter 1 Introduction 



