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



Core no. 



Water depth 

 (feet) 



Core length 

 (feet) 



Interval 

 (feet) 



Color code 



Description 



61 



68 



6.0 



Oto 6.0 



5Y 7/2 gray 



Clean, fine, well-sorted sand. 



62 



44 



4.8 



Oto 4.8 



2.5Y8/2 white 



Clean, medium to coarse sand. 



63 



42 



6.5 



Oto 6.5 



10YR8/1 white 



Clean, medium, well-sorted sand. 



64 



45 



5.0 



Oto 5.0 



2.5Y7/2 Ughtgray 



Clean, fine to medium, moderately 

 weU-sorted sand. 



65 



31 



5.8 



Oto 5.8 



10YR8/1 white 



Clean, very fine to fine, well-sorted sand. 



66 



44 



2.7 



Oto 1.0 



2.5Y 8/2 yellow 



Clean, fine to medium, well-sorted sand. 









1.0 to 1.5 



2.5Y6/2 gray 



Silty, very fine to fine sand. 









1.5 to 2.7 



2.5Y 8/6 yellowish-gray 



Clean, fine to medium sand. 



67 



48 



17.2 



Oto 0.5 



5Y5/1 gray 



Silty mud. 









0.5 to 2.0 



5Y6/2 Ughtgray 



Clean, medium to coarse sand with small 

 rounded rock fragments. 









2.0 to 9.0 



5Y 7/2 gray 



Clean, medium sand. 









9.0 to 9.8 



5Y5/1 gray 



SUty, very fine to fine sand. 









9.8 to 12.9 



5Y6/1 gray 



Cohesive clay. 









12.9 to 13.2 





Organic peat 



(see Table 4 for radiocarbon date). 









13.2 to 17.2 



5Y5/1 gray 



Silt grading to medium sand for bottom 

 0.3 foot. 



68 



84 



6.0 



Oto 1.0 



5Y5/3 gray 



Medium to coarse, moderately sorted 

 sand with some pea gravel ^ 1-inch 

 diameter. 









1.0 to 3.0 



10YR6/6 light brown 



Fine to coarse sand with rounded gravel. 









3.0 to 6.0 



5Y7/1 gray 



Very fine to fine sand with abundant 

 mica plates. 



69 



95 



17.3 



Oto 2.0 





Clean, fine to medium sand. 









2.0 to 2.1 



5Y5/1 gray 



Clay to very fine sand. 









2.1 to 17.3 



10YR7/3 brown 



Clean, fine to medium sand. 



70 



90 



12.0 



Oto 1.0 



2.5Y 7/3 yellow 



Clean, fine, poorly sorted sand. 









1.0 to 2.0 



2.5Y 8/2 white 



Slightly silty, coarse to very coarse sand. 









2.0 to 12.0 



10YR8/3 white 



Clean, silty, very fine, moderately 

 weU-sorted sand. 



93 



