f( RATE OF PRODUCTION) 



RATE OF ACCUMULATION OF BIOGENOUS CALCITE 



f'iRATE OF WSSOLUTION) 



t 



0- 



50- 



100- 



meters 



depth below ocean surface 



, ^ LAT 15°N 



1 — I — I — I — I — I — I — I — I — I — I — I — I — rn 



VERTICAL DISTRIBUTION OF CURRENTS 8 TEMPERATURE 

 IN SURFACE LAYER OF OCEAN 



4°S 



CARBONATE COMPENSATION SURFACE 

 5 I 10 



15 LAT17°N 



I I >60% 



1-60% 



0*/. CaCO. 



STRATIFICATION OF BOTTOM SEDIMENT 



Fig. 2. Meridional profile at approximately 130°W Long showing the distri- 

 bution of temperature and vertical motion in the surface layer of the ocean (middle 

 graph), the stratification of the bottom sediment (lower graph), and the interpre- 

 tation of the sedimentary record in terms of paleotemperature and rates of pro- 

 duction and dissolution of calcium carbonate from planktonic organisms (upper 

 graph) (Arrhenius, 1959a). 



131 



