Sediment Descriptions of Selected Cores— Continued 



CERC ID No. 



Core No. 



Water Depth 

 (ft.) 



Interval 

 (ft.) 



Description 



Ohio-Hetzel Shoal 



159 



139A 



15 



to 12 btm 



Variegated medium to coarse, well- 

 sorted, quartzose-calcareous sand; 

 moUusk fragments abundant, ooids 

 sparse. 



Mean size: 0.9 to 2 phi. 



Standard deviation: 0.3 to 1 phi. 



166 



146 



45 



to 3.5 btm 



Olive-gray to gray (5 year 4/2 to 4/1), 

 fine to coarse, quartzose-calcareous 

 sand; quartz content increases to 85 

 percent between 2 and 3.5 ft.; ooids 

 sparse. 



Mean size: 0.8 to 2.3 phi. 



Standard deviation: 0.2 to 0.6 phi. 



167 



147 



30 



to 11 btm 



Light gray to hght brownish gray (10 

 year 7/2 to 6/2), medium, well-sorted, 

 quartzose-calcareous sand; mollusk 

 fragments common, ooids sparse, 

 micro faunal tests trace. 



Chester Shoal 



185 



164 



42 



to 8.5 



Gray (5 year 6/1), medium, well-sorted, 

 quartzose-calcareous sand; mollusk 

 fragments abundant, ooids sparse. 









8.5 to 9.7 



Light brown (10 year 6/3), very fine to 

 fine moderately well-sorted, quartzose 

 sand; shell fragments abundant, micro- 

 faunal tests, mica sparse. 



186 



165 



28 



to 7.5 



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

 coarse, well-sorted, quartzose- 

 calcareous sand; ooids sparse. 









7.5 to 11 btm 



Gray (5 year5/l), fine to medium, 

 moderately well-sorted, quartzose- 

 calcareous sand; ooids trace; micro- 

 faunal tests sparse. 



187 



166 



20 



0to4 



Gray (10 year 6/1), coarse quartzose- 

 calcareous sand; mollusk fragments and 

 whole shells abundant; ooids sparse. 



Mean size: 0.57 to 1.07 phi. 



Standard deviation: 0.5 to 0.7 phi. 









4.0 to 12 



Gray (10 year 6/1, medium well-sorted, 

 quartzose-calcareous sand; mollusk frag- 

 ments common; ooids sparse. 



Mean size: 1.2 to 2.0 phi. 



Standard deviation: 0.24 to 0.44 phi. 



87 



