TABLE 1.

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

Form of Fe	Concn
	Range	Mean	SD
Total Fea	76–112	100.2	10.7
Weak-acid-soluble Fe(II)a	20–49	32.28	9.4
Magnetic mineralsab	8.4–15.6	11.34	1.8
Dissolved pore water Fe(II)c	<0.5–41	17.34	9.9

^aGrams per kilogram (dry weight) (n = 18). 

^bThe magnetic minerals were determined to be approximately 77% magnetite. See text. 

^cMilligrams per liter (n = 18).