Iowaite was found in a diamond drill core in serpentinite,at a depth of 1000-1500 feet.
8 entries listed. 8 valid minerals. 1 type locality (valid mineral).
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Kohls, D. & J. Rodda (1967) Iowaite, a new hydrous magnesium hydroxide - ferric oxychloride from the Precambrian of Iowa: American Mineralogist: 52 (9-10): 1261-1271.