Cosanodiscui noduhfer^ site distribution 

 M' «) to SO 1M' UO '« !tO 



ic) 

 Fig. 4. Carbonate concentration as a function of depth in Equatorial Pacific 

 sediment cores from (a) 106°VV Long and (6) 135°W Long, and (c) size frequency 

 distribution of the diatom Coscinodisciis nodulifer in the latter core (Arrhenius, 

 1952). 



135 



