APPENDIX B 



Sediment Descriptions of Selected Cores 



CERC ID No. 



Core No. 



Water Depth 

 (ft.) 



Interval 

 (ft.) 



Description 



Southeast Shoal 



114 



102 





to 6.5 



Gray-brown (2.5 year 5/2), medium to 

 coarse quartzose-calcareous sand; very 

 coarse to coarse shell layer at —1 ft. 



Mean size: 0.1 to 1.8 phi. 



Standard deviation: 0.3 to 0.9 phi. 









6.5 to 10 htm 



Gray (5 year 5/1), medium, poorly 

 sorted, quartzose-calcareous sand; in- 

 creased silt content at 6.5 to 7 ft. 



115 



103 



35 



to 7.5 



Gray-brown (10 year 5/2), medium to 

 coarse, well-sorted, quartzose- 

 calcareous sand; ooids sparse. 









7.5 to 10.8 btm 



Brownish gray (2.5 year 6/2), very fine 

 to fine quartzose sand; calcareous 

 grains (fragments, microfaunal tests) 

 common. 



128 



114 



30 



to 11.3 btan 



Light brownish gray, medium, well- 

 sorted, quartzose-calcareous sand; 

 ooids sparse to trace. 



Mean size: 0.7 to 1.4 phi. 



Standard deviation: 0.37 to 0.63 phi. 



Bull Shoal 



138 



122 



25 



to 10.1 btm 



Gray (10 year 5/1), medium to coarse, 

 well-sorted, quartzose-calcareous sand; 

 mollusk fragments abundant, ooids 

 trace. 



170 



150 



26 



to 4.5 



Gray (N7), medium to coarse, well- 

 sorted , quartzose-calcareous sand; 

 mollusk fragments common. 









4.5 to 7.6 btm 



Gray (N5), fine to medium, qiiartzose- 

 calcareous sand. 



196 



175 



33 



to 5 btm 



Light gray (2.5 year 7/2), medium, 

 well-sorted, quartzose-calcareous sand; 

 mollusk fragments abundant. 



Mean size: 1.3 to 1.8 phi. 



Standard deviation: 0.4 to 0.9 phi. 



197 



176 



13 



to 13 btm 



Variegated medium to coarse, well- 

 sorted, quartzose-calcareous; sand; 

 mollusk fragments abundant, ooids 

 sparse. 



Mean size: 0.97 to 1.4 phi. 



Standard deviation: 0.37 to 0.51 phi. 



86 



