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Analysis of stalagmite samples from caves in southern Morocco has provided new insights into rainfall patterns in the Sahara Desert in the past.
Stalagmites grow from bottom to top with banding similar to tree rings. Accurate chronology shows that the sample started to grow shortly before 6000 years ago. Credit: Dr Julia Barrott.
(Stalactites and stalagmites in caves grow in a similar way, but thousands of times faster.) This makes ferromanganese crusts ideal archives for capturing stardust over millions of years.
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