Impact spherules as a record of an ancient heavy bombardment of Earth

B. C. Johnson () and H. J. Melosh
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B. C. Johnson: Purdue University, 525 Northwestern Avenue, West Lafayette, Indiana 47907, USA
H. J. Melosh: Purdue University, 525 Northwestern Avenue, West Lafayette, Indiana 47907, USA

Nature, 2012, vol. 485, issue 7396, 75-77

Abstract: The fossilized remnants of vaporized asteroids, called spherules, can be used to infer that the flux of asteroid impacts on Earth 3.5 billion years ago was much greater than it is now.

Date: 2012
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DOI: 10.1038/nature10982

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