PLATE m 



Fig. 1. Sample 82, siliceous Globigerina ooze, central Pacific; 

 depth 4693 meters; 0.25- to 0.12-mm size grade; broken shells 

 of pelagic foraminifera, a few echinoid spines (CaC03 content 

 of sample, 85 per cent) 





Fig. 2. Sample 62, red clay, northeast Pacific, depth 3806 meters; 

 0.25- to 0.12-mm size grade; mostly broken shells of pelagic 

 foraminifera, radiolaria, sponge spicules (CaCOs content of 

 sample, 7 per cent) 



