Nature 395, 146–148 (1998).
We earlier reported finding unaltered cosmic spherules in samples from the Satakunta sandstone, Finland1. At that time, we had found 18 spherules in 5 kg of material, and an additional 100 spherules were recovered from the 60–125 m heavy mineral separates of the samples. Rocks collected later from the same and nearby sites had no spherules in them2. We have subsequently concluded that the cosmic spherules1 were not part of the Satakunta sandstone samples. The total number of spherules we found during processing in the Muenster laboratory (about 120) is in itself a compelling argument for an exceptional contamination.
References
Deutsch, A., Greshake, A., Pesonen, L. & Pihlaja, P. Unaltered cosmic spherules in a 1.4-Gyr-old sandstone from Finland. Nature 395, 146–148 (1998)
Kettrup, D. Mikrometeorite in terrestrischen Sedimenten—Eine systematische Analyse potentieller Wirtsgesteine unter besonderer Berücksichtigung des mesoproterozoischen Satakunta-Sandsteins (SW-Finnland). Inaug.-Diss., Univ. Münster (2002).
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The online version of the original article can be found at 10.1038/25943
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Deutsch, A., Greshake, A., Pesonen, L. et al. Retraction Note: Unaltered cosmic spherules in a 1.4-Gyr-old sandstone from Finland. Nature 429, 322 (2004). https://doi.org/10.1038/nature02607
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DOI: https://doi.org/10.1038/nature02607
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