Table A-4. Sediment description from Suffolk County sewer outfall cores. 



Core no. 



Water deptli 

 (feet) 



Core length 

 (feet) 



Interval 

 (feet) 



Description 



V-26 



18 



9.3 



to 1.2 

 1.2 to 1.5 

 1.5 to 3.5 

 3.5 to 4.5 



4.5 to 4.6 



4.6 to 7.0 

 7.0 to 9.3 



Light gray, very fine to fine sand. 



Black, clayey silt. 



Light gray to tan, medium, gravelly sand. 



Medium sand with shells. 



Black, silty clay. 



Medium, pebbly sand with shells. 



Fine sand. 



V-25 



28 



22.0 



to 3.0 

 3.0 to 4.0 

 4.0 to 5.0 

 5.0 to 8.0 

 8.0 to 9.0 

 9.0 to 11.2 

 11.2 to 12.0 

 12.0 to 17.0 



17.0 to 19.0 

 19.0 to 20.7 

 20.7 to 22.0 



Silty, fine to medium sand. 



Medium to coarse sand. 



Light gray, medium sand and gravel with shells. 



Fine to medium sand. 



Silty clay with abundant mica; occasional very fine sand layers. 



Fine to medium sand. 



Fine to medium sand. 



Fine to coarse sand; shelly at top and gravelly at bottom; 



occasional clay balls between 14 and 15 feet. 

 Medium, gravelly sand. 

 Light gray, fine to medium sand. 

 Light gray, fine to medium sand with gravel at bottom. 



V-16 



35 



21.0 



to 1.1 

 1.1 to 1.5 

 1.5 to 2.5 



2.5 to 8.6 



8.6 to 9.3 

 9.3 to 15.8 



17.0 to 21.0 

 21.0 to 21.6 



Greenish-black, fine sand with mica. 

 Gray, medium sand with shells. 

 Gray, fine sand. 

 Dark gray, sandy silt. 

 Black, organic clayey silt. 

 Gray, fine to medium sand. 

 Light gray, fine to coarse sand. 

 Coarse sand and small gravel. 



V-17 



42 



19.0 



to 0.5 

 0.5 to 0.7 

 0.7 to 1.0 



1.0 to 1.7 



1.7 to 3.1 



3.1 to 3.9 

 3.9 to 6.8 



8.8 to 8.8 

 8.8 to 9.0 

 9.0 to 17.8 



17.8 to 19.0 



Tan, medium sand. 



Black, silty sand. 



Gray, fine to medium sand. 



Sandy gravel vrith large shell fragments. 



Light gray, fine to medium sand with shells. 



Dark gray, sandy silt. 



Tan, fine to medium sand with thin clay lenses. 



Brown, silty sand. 



Brown, compact clay. 



Fine to medium sand with scattered pebbles. 



Fine to medium sand with layering of dark minerals. 



1. These cores (Fig. 8) are located along two nearly shore-normal transects in Suffolk County off Tobay and Cedar 

 Beaches. Sediment descriptions were obtained from Alpine Geophysical Associates, Incorporated. Visual logs of the 

 cores are shown in Figures 9A and 9B. Water depths, based on map location of each core, are approximate. 



100 



