

Table A-2. Sediment 



iescription from Nassau County cores.* 



Core no. 



Water depth 

 (feet) 



Core length 

 (feet) 



Interval 

 (feet) 



Description 



1 . 



53 



8.5 



2.5 

 5.0 



7.5 



Coarse sand. 

 Coarse sand. 

 Fine sand. 



2 



36 



8.3 



to 4.0 

 4.0 to 7.0 

 7.0 to 8.3 



Brown, medium sand with shell fragment. 

 Gray-brown, fine sand. 

 Coarse sand. 



3 



45 



10.5 



to 1.0 

 1.0 to 6.0 

 6.0 to 10.5 



Brown, medium sand. 



Gray, medium sand with shell fragment. 



Greenish-gray, silty clay. 



4 



56 



11.5 



to 9.0 

 2.0toll.5 



Medium sand. 

 Clay and silt. 



5 



52 



11.4 



to 3.0 

 3.0 to 6.0 

 6.0 to 10.0 

 10.0 to 11.4 



Brown, medium sand. 

 Gray, medium sand with shell fragment. 

 Gray, coarse sand with shell fragment. 

 Dark green, silty glauconitic sand. 



6 



58 



10.8 



2.5 



5.0 



6.7 to 10.8 



Medium sand. 

 Fine sand. 

 Clay and silt. 



7 



62 



7.2 



to 0.5 

 0.5 to 7.2 



Brown, medium sand. 

 Greenish -gray, glauconitic clay. 



8 



63 



6.3 



to 4.5 

 4.5 to 6.3 



Grayish-brown, coarse sand. 

 Light brown, medium sand. 



9 



34 



14.2 



to 2.5 

 2.5 to 6.0 

 6.0 to 14.2 



Light brown, fine sand. 

 Gray, fine sand. 

 Brown, medium sand. 



10 



56 



8.0 



2.5 



5.0 



6.0 to 6.7 



7.5 



Medium sand. 

 Fine sand. 

 Very coarse sand. 

 Medium sand. 



11 



47 



9.2 



to 2.0 

 2.0 to 9.2 



Brown, medium sand. 



Dark greenish-gray, glauconitic clay. 



96 



