DRY BULK-DENSITY AND CACO3 RELATIONSHIPS IN UPPER QUATERNARY SEDIMENTS OF THE EASTERN EQUATORIAL PACIFIC

Results from 1110 paired CaCO3 and bulk density measurements from core s raised from the eastern equatorial Pacific permit formulation of wel l constrained CaCO3-DBD relationships for that region. The cores lie a long a N-S transect at 110-degrees-W from 10-degrees-N to 3-degrees-S underneath the different currents of the equatorial current system and along an E-W transect from 110-degrees to 90-degrees-W, at approximat ely 3-degrees-S. Two distinct, crescent-shaped dry bulk density-CaCO3 relationships are observed. For equal CaCO3 percentages, sediments fro m those sites at 110-degrees-W, which are situated in the high product ivity zone, have lower dry bulk density. Cores raised from closer to s hore have relatively greater DBD.