Fig. 2: Amount and characteristics of ascorbate-extractable Fe (FeA) from the glacial source material and fjord surface sediment.

All data points are shown as black dots. The red boxes show the interquartile range and the thick horizontal line in the boxes shows the median. The vertical line at the top and the bottom of the boxes shows the maximum and the minimum, defined as 1.5× interquartile range. a Amount of FeA, b lability of FeA, c reducibility of FeA, and d composition of FeA. Surface sediment values are from 0 to 1 cm sediment depth.