Abstract
Schaeffer and Fisher1 have given values for the exposure ages (that is, the time during which the meteorites were exposed to cosmic rays after having been broken out of a bigger body) of 18 iron meteorites. These ages vary between 20 × 106 to 1,900 × 106 years. I think these authors have made some mistakes in interpreting the results of their experimental work.
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References
Schaeffer, O. A., and Fisher, D. E., Nature, 186, 1040 (1960).
Wänke, H., Z. Naturforsch. (in the press).
Goebel, K., and Schmidlin, P., Z. Naturforsch., 15, a, 79 (1960).
Fireman, E. L., and Zähringer, J., Phys. Rev., 107, 1695 (1957).
Schaeffer, O. A., and Zähringer, J., Z. Naturforsch., 13, a, 346 (1958).
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Fireman, E. L., and DeFelice, J., Geochim. et Cosmochim. Acta, 18, 183 (1960).
Wänke, H., and Vilcsek, E., Z. Naturforsch., 14, a, 929 (1959).
Wänke, H., Z. Naturforsch. (in preparation).
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WÄNKE, H. Exposure Ages for Iron Meteorites. Nature 188, 1101–1102 (1960). https://doi.org/10.1038/1881101a0
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DOI: https://doi.org/10.1038/1881101a0
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