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Summary: A sedimentary paleomagnetic record of the Matuyama chron
from the Western Antarctic margin (ODP Site 1101)
Yohan Guyodo aY
*, Gary D. Acton b
, Stefanie Brachfeld cY1
,
James E.T. Channell a
a
Department of Geological Sciences, University of Florida, Gainesville, FL, USA
b
Ocean Drilling Program, Texas ApM University, College Station, TX, USA
c
Institute for Rock Magnetism, University of Minnesota, Minneapolis, MN, USA
Received 25 January 2001; received in revised form 12 June 2001; accepted 12 June 2001
Abstract
A high-resolution paleomagnetic record for part of the Matuyama chron (0.7^2.1 Ma) is reported for Ocean Drilling
Program Site 1101 (Leg 178), off the Antarctic Peninsula Pacific margin. A rock-magnetic investigation of 62 discrete
samples revealed that the natural remanent magnetization (NRM) is carried by pseudo-single domain magnetite.
Progressive alternating field demagnetization of 83 m of U-channels provided a polarity stratigraphy down to the
Olduvai subchron. Two geomagnetic events preceding the Jaramillo subchron were identified, including the Cobb
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