Using electron microscopy-based structural "fingerprinting," researchers report that the magnetic iron oxide particles in fossil soil layers from the Chinese Loess Plateau consist primarily of magnetite, whose formation is driven by soil wetting and drying, suggesting that magnetic variations in Chinese Loess Plateau soils reflect variations in monsoon rainfall, which could provide a benchmark for testing paleoclimate models.
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Article #17-19186: "Identification and paleoclimatic significance of magnetite nanoparticles in soils," by Imad A.M. Ahmed and Barbara A. Maher.
MEDIA CONTACT: Barbara A. Maher, Lancaster University, UNITED KINGDOM; tel: +44-1524510268; e-mail: <b.maher@lancs.ac.uk>
Journal
Proceedings of the National Academy of Sciences