The volcano features a large summit crater and several subsidiary cones, a testament to its episodic eruptions over hundreds of thousands of years. This stratovolcano is part of the North Volcanic Zone of the Andes, a chain fueled by the subduction of the Nazca Plate beneath the South American Plate.
Nevado Del Ruiz Geological History Overview Facts
Historical Eruptions and Impact The volcano’s most infamous event occurred in 1985, when a relatively small eruption triggered the catastrophic collapse of the Armero crater lake’s retaining wall. 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.
Its structure includes numerous craters, some of which remain active, along with steep slopes carved by ancient glaciers and rivers. The continuous collision of these tectonic plates forces molten rock upward, creating the complex, cone-shaped structure characteristic of stratovolcanoes.
Nevado Del Ruiz Geological History Overview Facts
8 million years to the Pleistocene epoch, placing its formative activity within a period of intense mountain building. This tragedy underscored a critical fact: the deadliest aspect of the volcano was not the lava, but the secondary effects of water interacting with loose volcanic material.
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