\isual classification o£ sediments in the laboratory was based on 

 examination of samples under a binocular microscope and point counts of 

 constituent particles of representative samples. Additional comments 

 pertaining to sediment description are presented in Appendix C. 



Determination of sand volumes was made by planimetering areas of 

 accumulation depicted on the isopachous map (Figure 16) . The data were 

 consequently applied to the prismoidal formula: 



where 



V = 1/6 H (Sq + 4S^ + S2) 



V = Volume 



Jd = Height 



Sg and $2 cross sectional areas of upper and lower bases^ 



respectively. ' "■ 



Si = cross sectional area of the midsection. 



2. Scope 



Field work off the Florida east coast from Fernandina Beach south 

 to Miami was accomplished in 1965 by Alpine Geophysical Associates, Inc. 

 of Norwood, New Jersey, under contract to the Jacksonville District, Corps 

 of Engineers. Funding and technical supervision of the contract, includ- 

 ing layout of survey lines and selection of coring sites was provided by 

 the Coastal Engineering Research Center with administrative support from 

 the Jacksonville District office. 



The area under study and reported in this document lies on that part 

 of the Atlantic Continental Shelf which borders the southeastern coast of 

 Florida between 25°40' N (Miami) and 26°48' N (Palm Beach) (Figure 2). 

 Continuous seismic profiles and cores were obtained over the multiple reef 

 area in the south and through a transition zone to the northern limit of 

 the study area. The shelf region under study, comprising 141 square miles 

 in area, was covered by 176 statute miles of geophysical survey in water 

 depths ranging from 15 feet to 350 feet. The seismic profiles were supple- 

 mented by 31 three-inch I.D. cores ranging in length from 1.5 to 11 feet. 

 Tracklines and core locations are shown on Figure 3. 



Reports dealing with other sections of the Florida east coast based 

 upon the 1965 data collection program will be published in due course. 



