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Summary: Barker, P.F., Camerlenghi, A., Acton, G.D., and Ramsay, A.T.S. (Eds.)
Proceedings of the Ocean Drilling Program, Scientific Results Volume 178
14. DATA REPORT: THE MAGNETIC
MINERAL ASSEMBLAGE OF HEMIPELAGIC
DRIFTS, ODP SITE 10961
Stefanie A. Brachfeld,2 Y. Guyodo,3 and G.D. Acton4
INTRODUCTION
During Ocean Drilling Program (ODP) Leg 178, we drilled three sites
on sediment drifts deposited on the continental rise on the western
margin of the Antarctic Peninsula. These hemipelagic drifts were tar-
geted for their potential to preserve a continuous record of the behavior
of the West Antarctic Ice Sheet over the last 10 m.y. It has been pro-
posed that drift development is linked to advances and retreats of the
Antarctic continental ice sheet (Pudsey and Camerlenghi, 1998, and ref-
erences therein; Barker, Camerlenghi, Acton, et al., 1999). However, the
sediment is characterized by a very low carbonate content, with fora-
minifers restricted to very narrow intervals. This lack of carbonate pre-
cludes the construction of a 18O or CaCO3 stratigraphy, depriving these
sites of an important chronologic tool and global ice volume proxy.
As an alternative, we have compiled a rock-magnetic data set. Rock-
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