CONTENTS-Continued 



TABLES 



Page 



1 Generalized upper Eocene to Holocene stratigraphy of northern Florida 18 



2 Tentative correlation of seismic refraction layers and reflection units 40 



3 Lithologic classification of major sediment categories in north Florida 46 



4 Stratigrapliic summary of reflection units 71 



5 Areas and estimated quantities required for beach erosion control 83 



6 Median sieve diameter of composite samples for three north Florida 



counties by position on profile 84 



7 Summary of potential borrow areas near designated coastal communities .... 89 



FIGURES 



1 General map of the Florida peninsula showing location of the study area .... 11 



2 Survey tracklines and core locations, Fernandina to Jacksonville 12 



3 Survey tracklines and core locations, St. Augustine area 13 



4 Survey tracklines and core locations, St. Augustine to 28° 55'N. 14 



5 Survey tracklines and core locations, 28° 55'S. to Cape Canaveral 15 



6 Generalized bathymetry of the East Coast Shelf off north Florida 22 



7 Idealized profile of the Continental Shelf showing major geomorphic elements . 23 



8 Representative shelf profiles from the north Florida East Coast Shelf 24 



9 Photo reproduction of selected sections of seismic reflection profiles 26 



10 Photo reproduction of selected sections of seismic reflection profiles 27 



11 Location of schematic profiles presented in Figures 12 and 13 29 



12 Schematic shore-normal profiles showing typical subbottom reflection patterns . 30 



13 Schematic shore-normal profiles showing typical shallow subbottom bedding 



and structure 31 



14 Schematic shore-parallel profile showing configurations of primary reflectors 



and reflection units 32 



15 Contour map of red reflector (north part) 33 



16 Contour map of the red reflector (south part) 34 



17 Contour map of the wliite primary reflector 35 



18 Contour map of the green primary reflector (north part) 38 



19 Contour map on tlie surface at the green reflector (south part) 39 



20 Line profile reduction of seismic reflection profile line J, Fernandina grid area . 42 



