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Nevado Del Ruiz Research Paper

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The Nevado del Ruiz is a volcano in Colombia. The volcano is located in the Andes volcanic chain on the andean volcanic belt. Nevado del Ruiz was formed by subduction on the nazca oceanic plate boundaries. Subduction is “a geologic process in which one edge of one crustal plate is forced below the edge of another.” The Nevado del Ruiz is known as an active stratovolcano. ”A stratovolcano is a tall, conical volcano composed of one layer of hardened lava, tephra, and volcanic ash.” Stratovolcanoes have lava that is very viscous and magma that is acidic, making the eruption very violent. The viscosity increases as the silica content increases. Since stratovolcanoes are very viscous, the lava flows slower and only covers very small areas. Magma …show more content…
Pyroclastic flow is anything such as ash, cinders, and particles that come out of the volcano when it erupts. These materials thrown from the volcano can be more deadly than the lava or magma itself and could kill many more people. One of the most famous eruptions from the Nevado del Ruiz was in November of 1985, but it was not the first. The first and most important eruption that lead up to the many death caused in 1985 happened in 1845. The Nevado del ruiz volcano exploded with very little magma, but huge pyroclastic materials. This eruption flooded the River Lagunillas killing as many as 1,000 people. However the damage did not stop there. It continued for about 44 miles downstream. In 1894 the Armero village was built on top of the mudflow. This town grew quickly, gaining over 27,000 residents by 1900. The town being built on the mudflow was one main reason thousands of people died in 1985. Like it always does, history repeated itself by making the eruption of 1985, “South America's worst and globally the 4th worst volcanic known disaster." This eruption happened in mid November killing over 23,000 people. The eruption itself was small, with very little lava, but it caused a huge mudflow to sweep through the town. A mudflow is just a flow of mud, debris, and tons of water mixed up

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