Ancient cosmic spherules

Don Brownlee ()
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Don Brownlee: Department of Astronomy

Nature, 1998, vol. 395, issue 6698, 113-115

Abstract: Cosmic spherules form when dust particles hit the Earth, melting the upper atmosphere. Spectacularly well-preserved spherules have now been found in sandstone from Finland that is 1.4 billion years old, providing a new means of tracing long-term changes in our atmosphere, as well as changes in the Solar System's meteoroid population.

Date: 1998
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DOI: 10.1038/25840

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