SECT. 3] 



5°S 



PELAGIC SEDIMENTS 



5° 



709 



10° 



15°N 



1 — \ — r 



' I I I r 



I I r 



— 



depth below ocean surface 



rate 



VERTICAL DISTRIBUTION OF CURRENTS AND 

 TEMPERATURE IN SURFACE LAYER OF OCEAN 



Pleist. max. rate of 

 Pleist. min. rate of 



Lower Tertiary rate of 



production 

 dissolution 

 production 

 dissolution 



production 

 dissolution 



(glacial) 

 (interglacial) 



RATE OF ACCUMULATION OF BIOTIC CALCITE 



— 



5 

 nn 



Present carbonate connpensation line 



I I > 60% I I 1 - 607c 



J \ L 



1_J 1 I \ L 



STRATIFICATION OF BOTTOM SEDIMENT 

 I I I I I I I I 



5°S 



0° 



10° 



15°N 



Fig. 36. The equatorial sedimentation mechanism. For explanation, see text. 



