MIDDLE AND LATE QUATERNARY PALEOOCEANOLOG Y OF THE EAST PACIFIC RISE AT 21-DEGREES-S

Climatic stratigraphic intervals and dissolution cycles are determined in three cores of the metalliferous nanno-foraminiferal-oozes and cor related with the standard oxygen-isotope scale. Sedimentation rates we re 4 - 9 mm/1000 yr. SST-oscillations did not exceed 2-degrees-C durin g the last 250 - 300 kyr. As a rule the high preservation cycles corre spond with warm climatic stages involving the beginning of cold ones, alternatively the low preservation cycles correlate with cold stages a nd the beginning of warm ones.