Science Advances

Supplementary Materials

This PDF file includes:

  • table S1. Name, type, location, and description, with references if applicable, for each sediment sample used in this study.
  • table S2. LCF results for samples.
  • table S3. Principal component loadings.
  • fig. S1. Dialysis bag experiments with P. tricornutum.
  • fig. S2. Principal component loadings versus Fe(II) content for reference standards and samples.
  • fig. S3. Subset of reference spectra used for LCF that were also used for PCA, with Fe(II) content.
  • References (85–89)

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