PLATE X 



Fig. 1. Sample b9, diatom ooze, northeast Pacific, depth 5296 meters; 

 0.5- to 0.25-mm size grade; radiolaria, arenaceous foramlnlfera, 

 diatoms, volcanic glass, fresh grains of feldspar (CaCOs content of 

 sample, 5 per cent) 



Fig. 2. Sample 60, diatom ooze, northeast Pacific, depth 5198 meters; 

 0.5- to 0.25-mm size grade; radiolaria and a few diatoms (CaC03 

 content of sample, 0.9 per cent) 



m 



