Table 2a. Abyssal plain and abyssal hill environments; average sediment size 

 analyses and bulk grain densities. 

















Bulk 







Mean Grain 









Grain 



Environment 



No. 

 Samples 



Diameter 





Sand, 



% 



Silt, 



% 



Clay, 



% 



Density, 



Sediment Type 



mm 



4> 



g/cm^ 



Abyssal Plain 

















Sandy silt 



1 



0.0170 



5.88 



19.4 



65.0 



15.6 



2.461 



Silt 



3 



0.0092 



6.77 



3.2 



78.0 



18.8 



2.606 



Sand-silt-clay 



2 



0.0208 



5.59 



35.2 



33.3 



31.5 



2.653 



Clayey silt 



22 



0.0053 



7.57 



4.5 



55.3 



40.2 



2.650 



Silty clay 



40 



0.0021 



8.90 



2.5 



36.0 



61.5 



2.660 



Clay 



6 



0.0014 



9.53 



0.0 



22.2 



77.8 



2.663 



Bering Sea and 



Okhotsk Sea (Diatomaceous) 













Silt 



1 



0.0179 



5.80 



6.5 



76.3 



17.2 



2.474 



Clayey silt 



5 



0.0049 



7.68 



8.1 



49.1 



42.8 



2.466 



Silty clay 



23 



0.0024 



8.71 



3.0 



37.4 



59.6 



2.454 



Abyssal Hill 

















Deep-sea ("red' 



") pelagic clay 















Clayey silt 



17 



0.0056 



7.49 



3.9 



58.7 



37.4 



2.678 



Silty clay 



60 



0.0023 



8.76 



2.1 



32.2 



65.7 



2.717 



Clay 



45 



0.0015 



9.43 



0.1 



19.0 



80.9 



2.781 



Calcareous ooze 















Sand-silt-clay 



5 



0.0146 



6.10 



27.3 



42.8 



29.9 



2.609 



Silt 



1 



0.0169 



5.89 



16.3 



75.6 



8.1 



2.625 



Clayey silt 



15 



0.0069 



7.17 



3.4 



60.7 



35.9 



2.678 



Silty clay 



4 



0.0056 



7.48 



3.9 



39.9 



56.2 



2.683 



27 



