Solid phase iron fractions for all stations (in µmol/g).

<p>The fractions, as determined with the sequential extraction procedure of Poulton and Canfield <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101139#pone.0101139-Poulton1" target="_blank">[29]</a>, are carbonate-associated Fe (Fe-Carb) magnetite (Fe-Mag), Fe extracted with a hydroxylamine-HCl extraction (Fe-Ox1, targets amorphous Fe-oxides) and Fe extracted in the dithionite extraction (Fe-Ox2, targets crystalline Fe-oxides). All sediments were Unit I sediments except for the Unit II sediments at station 7620 and the turbidite and Unit II sediments at station 5. Note the differences in depth scale for each station. Water depth is given in meters below sea surface (mbss).