Discovery of a 25-cm asteroid clast in the giant Morokweng impact crater, South Africa

  title={Discovery of a 25-cm asteroid clast in the giant Morokweng impact crater, South Africa},
  author={Wolfgang D. Maier and Marco A. G. Andreoli and Iain McDonald and Michael Denis Higgins and Adrian J Boyce and Alexander Shukolyukov and Gunter W. Lugmair and Lewis D. Ashwal and Peter P. H. Gr{\"a}ser and Edward M. Ripley and Rodger J. Hart},
Meteorites provide a sample of Solar System bodies and so constrain the types of objects that have collided with Earth over time. Meteorites analysed to date, however, are unlikely to be representative of the entire population and it is also possible that changes in their nature have occurred with time. Large objects are widely believed to be completely melted or vaporized during high-angle impact with the Earth. Consequently, identification of large impactors relies on indirect chemical… 

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