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Science 31 October 1969:
Vol. 166. no. 3905, pp. 604 - 606
DOI: 10.1126/science.166.3905.604
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Articles

Freshwater Ferromanganese Concretions: Chemistry and Internal Structure

Robert C. Harriss 1 and Arthur G. Troup 2

1 Oceanography Department, Florida State University, Tallahassee
2 Geology Department, McMaster University, Hamilton, Ontario

Studies by optical microscopy, x-ray diffraction, and electron probe techniques of ferromanganese concretions from three Canadian lakes reveal chemical banding of amorphous hydrated iron and manganese oxides. The average ratio of iron to manganese in concretions from these lakes varies from 0.43 to 2.56. The concentrations of cobalt, nickel, copper, and lead are one to two orders of magnitude below those reported for oceanic ferromanganese concretions.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Characterization of Iron- and Manganese-Cemented Redoximorphic Aggregates in Wetland Soils Contaminated with Mine Wastes.
P. J. Hickey, P. A. McDaniel, and D. G. Strawn (2008)
J. Environ. Qual. 37, 2375-2385
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Earthquake Prediction and Control.
L. C. Pakiser, L. C. Pakiser, J. P. Eaton, J. H. Healy, and C. B. Raleigh (1969)
Science 166, 1467-1474
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