Table la. Continental terrace (shelf and slope) environment; average sediment 

 size analyses and bulk grain densities. 

















Bulk 







Mean Grain 









Grain 



Sediment 



No. 

 Samples 



Diametei 





Sand, 



% 



Silt, 



% 



Clay, 



% 



Density, 



Type 



mm 







g/cm^ 



Sand 

















Coarse 



2 



0.5285 



0.92 



100.0 



0.0 



0.0 



2.710 



Fine 



18 



0.1638 



2.61 



92.4 



4.2 



3.4 



2.708 



Very fine 



6 



0.0915 



3.45 



84.2 



10.1 



5.7 



2.693 



Silty sand 



14 



0.0679 



3.88 



64.0 



23.1 



12.9 



2.704 



Sandy silt 



17 



0.0308 



5.02 



26.1 



60.7 



13.2 



2.668 



SUt 



12 



0.0213 



5.55 



6.3 



80.6 



13.1 



2.645 • 



Sand-silt-clay 



20 



0.0172 



5.86 



32.2 



41.0 



26.8 



2.705 



Clayey silt 



60 



0.0076 



7.05 



7.2 



59.7 



33.1 



2.660 



Silty Clay 



19 



0.0027 



8.52 



4.8 



41.2 



54.0 



2.701 



Table lb. Continental terrace (shelf and slope) environment; sediment densities, 

 porosities, sound velocities and velocity ratios. 



Sediment 



Density, 

 g/cm^ 



Porosity, 



% 



Velocity, 

 m/sec 





Velocity 

 Avg. 



Ratio 



Type 



Avg. 



SE 



Avg. 





SE 



Avg. 





SE 



SE 



Sand 























Coarse 



2.034 



- 



38.6 





- 



1836 





- 



1.201 



- 



Fine 



1.957 



0.023 



44.8 





1.36 



1753 





11 



1.147 



0.007 



Very fine 



1.866 



0.035 



49.8 





1.69 



1697 





32 



1.111 



0.021 



Silty sand 



1.806 



0.026 



53.8 





1.60 



1668 





11 



1.091 



0.007 



Sandy silt 



1.787 



0.044 



52.5 





2.44 



1664 





13 



1.088 



0.008 



Silt 



1.767 



0.037 



54.2 





2.06 



1623 





8 



1.062 



0.005 



Sand-silt-clay 



1.590 



0.026 



66.8 





1.46 



1579 





8 



1.033 



0.005 



Clayey silt 



1.488 



0.016 



71.6 





0.87 



1549 





4 



1.014 



0.003 



Silty clay 



1.421 



0.015 



75.9 





0.82 



1520 





3 



0.994 



0.002 



Notes: Laboratory values: 23°C, 1 atm; density: saturated bulk density; porosity: salt free; velocity 

 ratio: velocity in sediment/velocity in sea water at 23°C, 1 atm, and salinity of sediment pore 

 water. SE: standard error of the mean. 



26 



