This real-time monitoring allows for timely warnings and evacuations, mitigating the risk to the nearly 500,000 people living in nearby valleys. 8 million years to the Pleistocene epoch, placing its formative activity within a period of intense mountain building.
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The resulting lahar, a volcanic mudflow of water, ash, and debris, cascaded down the slopes at terrifying speed, obliterating the town of Armero and killing over 23,000 people. Understanding Nevado del Ruiz means confronting both its serene beauty and its capacity for devastating power, making it a subject of enduring scientific and public interest.
Geological Formation and Age The origins of Nevado del Ruiz trace back approximately 1. These ice fields, including the famous Las Nieves glacier, are vital indicators of the volcano's thermal history and the broader effects of global climate change.
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Glaciers and Climate Change Capping the summit are several small but significant glaciers, a rare sight near the Colombian coffee region. Over hundreds of thousands of years, alternating layers of lava, ash, and rock fragments built the massive edifice visible today, establishing the foundation for its future volatility.
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