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Biologic Origin of Iron Nodules in a Marine Terrace Chronosequence, Santa Cruz, California

Dates

Year
2010

Citation

Schulz, Marjorie S, Vivit, Davison, Schulz, Charles, Fitzpatrick, John, and White, Art, 2010, Biologic Origin of Iron Nodules in a Marine Terrace Chronosequence, Santa Cruz, California: Soil Science Society of America Journal, v. 74, iss. 2, p. 550-564.

Summary

The distribution, chemistry, and morphology of Fe nodules were studied in a marine terrace soil chronosequence northwest of Santa Cruz, California. The Fe nodules are found at depths <1 m on all terraces. The nodules consisted of soil mineral grains cemented by Fe oxides. The nodules varied in size from 0.5 to 25 mm in diameter. Nodules did not occur in the underlying regolith. The Fe-oxide mineralogy of the nodules was typically goethite; however, a subset of nodules consisted of maghemite. There was a slight transformation to hematite with time. The abundance of soil Fe nodules increased with terrace age on the five terraces studied (aged 65,000–226,000 yr). Scanning electron microscopy (SEM) revealed Fe-oxide-containing fungal hyphae [...]

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  • USGS National Research Program

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Added to ScienceBase on Thu Apr 18 09:20:35 MDT 2013 by processing file <b>Geochemical Reactions Between Water and Mineral Substrates.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13">https://www.sciencebase.gov/catalog/item/51118c8ae4b0361176563a13</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.2136/sssaj2009.0144

Citation Extension

journalSoil Science Society of America Journal
parts
typePages
value550-564
typeVolume
value74
typeIssue
value2
citationTypeJournal Article

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