In a groundbreaking discovery, scientists have finally unraveled the age of one of Earth's most magnificent natural wonders – the star dunes.
These colossal sand formations, characterised by their pyramid-like shapes, have long captivated the imagination of researchers and adventurers alike. Found across continents and even on the red plains of Mars, star dunes have remained enigmatic, their formation shrouded in mystery until now.
In a collaborative effort between experts at the University of Aberystwyth and Birkbeck University, led by Professors Geoff Duller and Charles Bristow, a remarkable breakthrough has been achieved. The focal point of this revelation is the Lala Lallia dune, nestled within the Erg Chebbi sand sea in southeastern Morocco.
Rising 100 meters tall and stretching 700 meters wide with sprawling arms, Lala Lallia holds a history dating back 13,000 years, as unveiled by the meticulous study.
cs, a phenomenon that reshapes landscapes over millennia. Understanding the age of these formations provides invaluable insights into the climatic conditions and wind patterns of eras long past, shedding light on Earth's dynamic history.
Utilizing a sophisticated technique known as luminescence dating, researchers analyzed sand samples from the heart of Morocco's desert. By measuring the last exposure of sand grains to daylight, scientists discerned the age of Lala Lallia and uncovered its remarkable journey through time. Prof. Duller likens the mineral grains within the sand to "little rechargeable batteries," storing energy derived from natural radioactivity. This stored energy, when 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 marks a pivotal moment in our understanding of Earth's geological tapestry. Star dunes, previously overlooked in the annals of geological history due to their sheer magnitude, now emerge as key players in unraveling Earth's past climates and landscapes.
Beyond Morocco, other exemplars of these monumental dunes dot the globe, including the towering Star Dune in Colorado, USA. Prof. Duller, recounting the arduous climb up these sand behemoths, speaks of the breathtaking vistas awaiting atop, a testament to nature's grandeur.
