Figure 5. View north at Boca Raton site, 4 May 1970; low tide 

 (H = 1.0 ft; T = 4.6 s; a^ = -20°). Note coquina 

 exposure in swash zone. 



Figure 6. Coquina exposure about 2 miles south of the Boca 

 Raton site, 15 May 1974; low tide (H = 2.9 ft; 

 T = 5.2 s; a^j = 0°). 



