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doi:10.2204/iodp.proc.342.207.2018

Introduction

Integrated Ocean Drilling Program (IODP) Expedition 342 recovered ~5.4 km of hemipelagic sediment drifts from the J-Anomaly and Southeast Newfoundland Ridge in the northwest Atlantic, off the coast of Newfoundland. Routine shipboard measurements were used to develop magneto- and biostratigraphic age models (see the “Expedition 342 summary” chapter [Norris et al., 2014a]). The shipboard magnetostratigraphy was based on the measurement of natural remanent magnetization (NRM) of the archive-half cores after 20 mT alternating field (AF) demagnetization on a wide-bore superconducting rock magnetometer in a magnetically noisy laboratory environment. In the present study, we performed detailed shore-based paleomagnetic measurements on the sedimentary sections recovered at Sites U1403, U1408, U1409, and U1410 (Fig. F1) to test and improve the shipboard magnetostratigraphy.

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