APPENDIX A 



CORE SEDIt^ENT DESCRIPTIONS 



Appendix A contains visual descriptions of sediment from cores in 

 the study area. Except where noted, sample locations are shown in 

 Figure 2. 



Visual descriptions for the CERC cores are based on both megascopic 

 and microscopic examination. Sediment color is based on dry sample per 

 Munsell Soil Color Charts (Munsell Color Company, Incorporated, Baltimore. 

 Maryland, 1954 Edition) . 



Sediment descriptions for the other three groups of cores off Nassau 

 and Suffolk Counties were obtained from reports and logs. 



Sediment names are based on the Wentworth size-scale as follows: 



Sediment 



Size (mm) 



Phi 



gravel 



>2 



<-l 



very coarse sand 



1.0 to 2.0 



Oto-1 



coarse sand 



0.5 to 1.0 



ItoO- 



medium sand 



0.25 to 0.5 



2tol- 



fine sand 



0.125 to 0.25 



3to2- 



very fine sand 



0.0625 to 0.125 



4to3- 



silt and mud 



< 0.0625 



>4 



Sorting Terms 



.« 



Phi 



very well-sorted 



well-sorted 



moderately well-sorted 



moderately sorted 



poorly sorted 



very poorly sorted 



extremely poorly sorted 



0.35 

 0.50 

 0.80 

 1.40 

 2.00 

 2.60 



'Verbal sorting terms from Friedman (1962). 



87 



