Scientists reveal secrets to Earth’s magnificent desert star dunes, found in Asia, African –– and on Mars
Star dunes, also known as pyramid dunes, have been a source of wonder for historians and indigenous people, existing in Asia, Africa, and even on Mars. These dunes, which can reach heights of about 1000 feet, are constantly shifting due to wind erosion. Scientists have gained insights into the mechanics of star dunes by studying the Lala Lallia dune in eastern Morocco, named ‘highest sacred point’ in the local Berber language.
Berbers in Morocco
Using radar technology and luminescence dating, researchers have determined that Lala Lallia began forming approximately 13,000 years ago, accumulating about 6,400 metric tons of sand annually over the past 900 years. Only about 10% of the world’s sand dunes are star dunes, with driving on them being a popular activity in regions like the Sahara. However, dune bashing is criticized for its environmental impact, with trekking on foot or by camel being preferred.
“I first encountered star dunes in Namibia 20 years ago and was instantly amazed at their size. I have a vivid memory of the long climb to the top, struggling up very loose sand in the heat of the day,” shared geographer, Geoff Duller.
Earth’s largest star dunes can be found in the Badain Jaran desert in western China, along with other sand seas in places like Algeria and Saudi Arabia.
Rub’ al Khali, Empty Quarter, Saudi Arabia (Wikipedia)
Earth’s largest star dunes can be found in the the Badain Jaran desert in western China. There are also sand seas in Algeria such as the Grand Erg Oriental and Grand Erg Occidental, and Rub’ al Khali in Saudi Arabia.
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