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Science 7 April 1967:
Vol. 156. no. 3771, pp. 66 - 67
DOI: 10.1126/science.156.3771.66
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Articles

Radiocarbon Dating of Biogenetic Opal

L. P. Wilding 1

1 Department of Agronomy, Ohio State University, Columbus

Approximately 75 grams of biogenetic opal were isolated from 45 kilograms of soil by employing gross particle-size and sink-float specific gravity fractionation procedures. After pretreatment of the sample to remove extraneous organic and inorganic carbon contaminants, the carbon occluded within opal phytoliths was dated at 13,300 ± 450 years before the present. Therefore, biogenetic opal is stable for relatively long periods.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Palaeosols.
J. A. Catt and J. A. Catt (1987)
Progress in Physical Geography 11, 487-510
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Stability of Biogenetic Opal.
E. D. Gill (1967)
Science 158, 810
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