Table 1.

Summary of the various forms of iron found in the sediments of the CDAR delta

Form of FeConcn
Total Fea76–112100.210.7
Weak-acid-soluble Fe(II)a20–4932.289.4
Magnetic mineralsa, b8.4–15.611.341.8
Dissolved pore water Fe(II)c<0.5–4117.349.9
  • a Grams per kilogram (dry weight) (n = 18).

  • b The magnetic minerals were determined to be approximately 77% magnetite. See text.

  • c Milligrams per liter (n = 18).