potential sources for sand fill (Figure 25). Core 50 in the long north- 

 westerly trending shoal between St. Lucie and Capron Shoal contains 

 excellent material in the upper 4 feet. Cores 67, 68, and 83 from a 

 nameless shoal 6 miles northeast of Fort Pierce Inlet recovered Type A 

 sand to a depth of about 6 feet. Core 87 in another nameless shoal 

 extending northeastward from Fort Pierce Inlet contained 5 feet of 

 suitable material. 



Except for Thomas Shoal, there are no large shoals between Fort 

 Pierce grid and Canaveral Bight. Since the reconnaissance lines cover- 

 ing this area are all close inshore, no data is available on Thomas Shoal. 

 Cores from the Fort Pierce-Cape Kennedy reconnaissance lines are for the 

 most part devoid of material suitable for beach fill. Only core 181 

 south of Sebastian Inlet contains material of possible value - a 2-foot 

 layer of coarse quartzose sand overlain by about a foot of silty sand. 



South of Fort Pierce grid only two cores were obtained between the 

 grid and Palm Beach. One of these - core 55 - located near the landward 

 base of Pierce Shoal contains about 8 feet of good Type A material. Data 

 elsewhere on Pierce Shoal and on three other large shoals of the Fort 

 Pierce-Palm Beach reconnaissance areas - St. Lucie and Gilbert Shoals and 

 an unnamed shoal 4 miles east of St. Lucie Inlet - is lacking. By analogy 

 with the grid area these shoals are expected to be good prospects which 

 warrant further investigation. 



Although the shoal areas are the most favorable sites for borrow, 

 suitable Type A sediment is widely distributed between shoals in the 

 form of a thin blanket deposit. Effects of exploitation of offshore 

 deposits for large volume supply is presently under investigation. 



# 



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