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that grew more than 250 million years ago in what is now north-east Scotland. The fact no others have been found is something of a surprise given they can now be found across Africa, Arabia, China, and North America, and even on extraterrestrial deserts onResearchers from University College London and Aberystwyth University in the UK have created the first detailed analysis of a star dune, choosing as their subject the Lala Lallia dune in southeast Morocco.
The findings came as something of a surprise. In spite of the foundation's old age, much of the upper dune's formation had taken place only over the last thousand years. The structure also happens to be moving west across the desert at the rate of around 50 centimeters per year.
The challenge now is to go back to the geological record with the new analysis, and try and identify star dunes that might otherwise have been missed, because researchers weren't sure of the size or the patterns that they were looking for.
France Dernières Nouvelles, France Actualités
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