S. Guichard et al., Late Quaternary benthic foraminiferal records testifying lateral variability of the Cape Blanc upwelling signal, CR AC S IIA, 329(4), 1999, pp. 295-301
Citations number
24
Categorie Soggetti
Earth Sciences
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DELA TERRE ET DES PLANETES
We reconstructed the Late Quaternary productivity record of two cores of th
e NW Africa upwelling area. Cores SEDORQUA 20bK and 17aK contain a continuo
us record down to isotopic stage 7 and show the lateral variability of the
palaeoproductivity signal. Several palaeo-environmental proxies, using bent
hic foraminiferal compositions, have been applied and are confronted with g
eochemical pro,ties. In both cores the highest values of palaeoproductivity
were registered in glacial stages. These differences between the two cores
show that the intensity of upwelling cells descreased to the deeper locati
on core and also that the quality of the input of organic flux becomes pred
ominantly refractory. ((C) Academie des sciences/ Elsevier, Paris.).