PLATE VI 



Fig. 1. Sample &4, Drown volcanic mud, 

 northeast Pacific, depth 6008 meters; 

 0.25- to 0.12-mm size grade; grains of 

 pumice and volcanic glass, radiolaria, 

 sponge spicules (CaCOs content of sam- 

 ple, 5 per cent) 



Fig. 2. Sample 44, Globigerina ooze, south- 

 east Pacific, depth 3966 meters; 0.25- to 

 0.12-mm size grade; mostly broken shells 

 of pelagic foraminifera together with 

 some unbroken young forms (CaC03 con- 

 tent of sample, 75 per cent) 



Fig. 3. Sample 23, Globigerina ooze, south- 

 east Pacific, depth 4007 meters; 0.25- to 

 0.12-mm size grade; entire and broken 

 shells of pelagic foraminifera and com- 

 mon benthonic foraminifera including 

 Eponides. Pulvinulinella and Uvlgerina ; 

 few manganese grains (CaC03 content of 

 sample, 75 per cent) 



Fig. 4. Sample 31, siliceous (calcareous) 

 red clay, southeast Pacific, depth 3657 

 meters; 0.25- to 0.12-mm size grade; 

 mostly broken shells of pelagic foramin- 

 ifera; benthonic foraminifera, including 

 PuUenia ; radiolaria and skeletons of 

 sponge spicules (CaC03 content of sam- 

 ple, 20 per cent) 



