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Science 22 March 1991:
Vol. 251. no. 5000, pp. 1473 - 1476
DOI: 10.1126/science.251.5000.1473
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Articles

Variations in Terrigenous Input into the Deep Equatorial Atlantic During the Past 24,000 Years

ROGER FRANCOIS 1 and MICHAEL P. BACON 1

1 Chemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543

Estimates of terrigenous fluxes at three different water depths at two sites in the equatorial Atlantic by normalization against excess 230Th flux indicate that the flux of terrigenous material to the seafloor was significantly higher during the last glacial period than it is today. Fluxes started to decrease during deglaciation and reached minimal values in the middle of the Holocene. From 15,000 to 5,000 years ago, there was a substantial increase in flux with increasing water depth below 2,800 meters; this increase may reflect resuspension and lateral transport of slope and rise sediment, possibly because of intensification of deepwater circulation during that period.

Submitted on September 18, 1990
Accepted on January 4, 1991


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Influence of northwest Pacific productivity on North Pacific Intermediate Water oxygen concentrations during the Bolling-Allerod interval (14.7-12.9 ka).
J. Crusius, T. F. Pedersen, S. Kienast, L. Keigwin, and L. Labeyrie (2004)
Geology 32, 633-636
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