In a groundbreaking discovery, scientists have successfully unveiled the age of one of Earth’s most captivating natural wonders – the star dunes.
These colossal sand formations, recognized for their pyramid-like shapes, have mystified researchers and adventurers alike for years. Spread across continents and even gracing the red plains of Mars, the enigma surrounding the formation of star dunes has finally been unraveled.
A collaborative effort led by Professors Geoff Duller and Charles Bristow from the University of Aberystwyth and Birkbeck University, respectively, has achieved a remarkable breakthrough. The epicenter of this revelation lies within the Lala Lallia dune, nestled in the Erg Chebbi sand sea in southeastern Morocco.
Standing proudly at 100 meters tall and stretching 700 meters wide with sprawling arms, Lala Lallia now holds a rich history dating back 13,000 years, as revealed by a meticulous study.
These sand giants are a product of aeolian processes, where wind gradually shapes landscapes over vast periods. Unraveling the age of these formations provides invaluable insights into the climatic conditions and wind patterns of bygone eras, thereby illuminating Earth’s dynamic history.
Employing a sophisticated technique known as luminescence dating, researchers meticulously analyzed sand samples from Morocco’s desert heart. By measuring the last exposure of sand grains to daylight, scientists discerned the age of Lala Lallia, uncovering its remarkable journey through time. Prof. Duller aptly describes the mineral grains within the sand as “little rechargeable batteries,” storing energy derived from natural radioactivity. This stored energy, released in the form of light in the laboratory, offers a glimpse into the dune’s age and evolution.
The revelation of Lala Lallia’s age signifies a pivotal moment in understanding Earth’s geological tapestry. Star dunes, previously overshadowed in the geological history due to their sheer magnitude, now emerge as key players in deciphering Earth’s past climates and landscapes.
Beyond Morocco, other monumental examples of these dunes grace the globe, including the towering Star Dune in Colorado, USA. Prof. Duller, recounting the challenging ascent of these sand behemoths, speaks of the breathtaking vistas awaiting at the summit—a testament to nature’s grandeur.
