51 



-j^ .r~ 



Plate 6. -Classification: system Marine, SUBSYSTEM Intertidal, CLASS Unconsolidated Shore, subclass Sand, water regimes 

 Regularly Flooded (lower two-thirds of beach) and Irregularly Flooded (upper one-third of beach near base of cliffs), water 

 chemistry Euhaline. (Point Reyes National Seashore, Marin County, California; August 1975; Photo by V. Carter) 



