Paleoceanographic variability on a millennial scale: a high resolution record of the latest deglaciation from the Blake Outer Ridge, western North Atlantic
Schlegel, Mary Ann
MetadataShow full item record
LocationBlake Outer Ridge
Strong temporal and geographic variabilty in paleocirculation during the latest deglaciation is demonstrated for the Blake Outer Ridge, Western North Atlantic. Cores KNR140-2 GGC-39 from 2975 meters and GGC-40 from 2924 meters show correlative oscillations in Cibicidoides and Uvigerina abundances, and δ180 from Globigerinoides ruber (white) which suggest that the Western Boundary Undercurrent and NADW fluctuated on a decadal to century scale between 14,000 and 10,000 14C years BP. Furthermore, between 13,500 and 13,300 14C years BP and 10,900 and 10,600 14C years BP, the coincidence of benthic foraminifera abundance maxima and benthic δ13C minima from C. wuellerstorfi indicate an increased influence of AABW relative to NADW in the vicinity of 3000 meters on the Blake Outer Ridge.
Submitted in partial fulfillment of the requirements of the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1998
Showing items related by title, author, creator and subject.
Experimental and seismological constraints on the rheology, evolution, and alteration of the lithosphere at oceanic spreading centers deMartin, Brian J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-02)Oceanic spreading centers are sites of magmatic, tectonic, and hydrothermal processes. In this thesis I present experimental and seismological constraints on the evolution of these complex regions of focused crustal ...
Caron, David A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1984-06)The distribution and feeding behavior of bacterivorous micro flagellates (2-20 μm protozoa) and their ingestion by copepods were examined in an attempt to assess the importance of these protozoa as a trophic link ...
Henrichs, Susan M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-08)Dissolved free amino acids (DFAA) were measured in interstitial water samples squeezed from sediments collected in a variety of depositional environments. These sediments were further characterized by measurements of ...