Table A-1. Sediment description of Coastal Engineering Research Center cores from Long Island south shore. 



Core no. 



Water depth 

 (feet) 



Core length 

 (feet) 



Interval 

 (feet) 



Color code 



Description 



1 



39 



13.5 



0.0 to 0.5 



5Y6/1 gray 



Silty, medium, poorly sorted sand with 

 small pebbles and shell fragments. 









0.5 to 1.0 



lOYR 7/2 brown 



Clean, fine to medium, moderately 

 sorted sand with small pebbles and shell 

 fragments. 









1.0 to 1.5 



lOYR 7/2 brown 



Clean, fine to medium sand with 

 rounded pebbles < 0.75-inch diameter. 









1.5 to 5.1 



2.5Y 7/2 gray 



Clean, medium to coarse sand with 

 abundant dark mica flakes. 









5.1 to 6.4 



5Y 7/2 gray 



Silty, medium to coarse sand. 









6.4 to 6.7 



5Y6/2 gray 



Silty, medium, poorly sorted sand and 

 rounded gravel. 









6.7 to 11.0 



5Y7/1 gray 



Silty, very fine to fine, poorly sorted, 

 micaceous sand. 









11.0 to 12.0 





Organic peat 



(see Table 4 for radiocarbon date). 









12.0 to 13.5 



5Y 7/1 gray 



Cohesive clay. 



2 



33 



11.1 



Oto 5.0 

 5.0 to 6.8 



5Y6/1 gray 



Silt to clay, with shells. 



Peat 



(see Table 4 for radiocarbon date). 









6.8 to 11.1 



10YR6/4 brown 



Shglitly silty, medium to coarse, 

 moderately sorted sand. 



3 



29 



9.0 



Oto 1.0 



5Y7/1 gray 



Silty, fine to medium sand. 









1.0 to 4.0 



2.5Y8/2 white 



Clean, fine, moderately well-sorted sand. 









4.0 to 9.0 



5Y 8/2 gray 



Clean, fine to medium sand with shell 

 fragments. 



4 



35 



15.4 



Oto 9.0 



5Y6/1 gray 



Micaceous mud. 









9.0 to 13.5 



2.5Y6/2 gray 



SUty, fine sand. 









13.5 to 15.4 



10YR6/4 brown 



Clean, fine, weU-sorted sand. 



5 



38 



15.8 



Oto 1.0 



5Y 6/2 gray 



Cohesive clay. 









1.0 to 2.1 



5Y 7/2 gray 



Very fine sand or silt. 









2.1 to 15.8 



5Y6/2 gray 



Cohesive clay. 



