| dc.description.abstract | QUATERNARY PALEOCLIMATIC ZONATION OF SANTOS BASIN BASED ON
PLANKTONIC FORAMINIFERA. The climatic zones based on planktonic
foraminifera, from two piston cores collected on the slope of the Santos Basin, has
shown the record of climate oscillations over the last ~ 620 ka. Were
recognized seven zones and 14 subzones, represented by glacial (zones U, W
and Y; subzones U2, U1, W2, W1, Y2, Y1B, Y1A) and interglacial interval (zones T,
V and X; subzones V3, V2B, V2A, V1, X1 to X3) of Pleistocene and the Holocene
(zone Z). The Pulleniatina plexus permitted the division of subzone V2 into two
(V2B and V2A) and provides eight regional correlation horizon along the subzones
V3 and V2. The coiling direction of Globorotalia truncatulinoides helped the
recognition of boundaries between subzones U2/U1, V2B/V2A, X3/X2 and X2/X1,
showing as useful tool for the refinement of the zones and subzones of the
Quaternary. The permanent presence of Globorotalia inflata suggests a
constant influence of cold and productive waters over the past ~ 620 ka, especially in
the southern of the study area. | en |
