Abstract
The tests of four equatorial species of planktonic Foraminifera (Globigerinoides sacculifer, Pulleniatina obliquiloculata, Globorotalia menardii and Globorotalia tumida) found in surface sediments delimit by percentage abundance contours the meander belt of the late Holocene Gulf Stream eastward from Cape Hatteras to 40°W. This band of faunal influence is only slightly wider than the meander belt observed over the past two decades, and it terminates in the same area where the surface expression of the Gulf Stream markedly weakens.Three resistant Gulf Stream indicator species are apparently transported to the south along the continental margin and selectivity concentrated by a near-bottom contour current (the Western Boundary Undercurrent).
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