Age models of sediment cores from the continental margin of northwest Africa, supplement to: Abrantes, Fatima F (1991): Variability of upwelling off NW Africa during the latest Quaternary: diatom evidence. Paleoceanography, 6(4), 431-460

Fatima F Abrantes
Diatom abundance and species composition were quantitatively studied in two latest Quaternary (~130 ka to the Present) sequences from the continental margin of northwest Africa. Off this region, coastal upwelling is well developed under the influence of the NE trade winds. Variations in diatom abundance in these cores are inferred to represent changes caused by varying degrees of the upwelling fertility. Times of high productivity are marked by high relative frequencies of Chaetoceros, while low...
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