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Should anyone ever decide to make a show called "CSI: Geology," a group of scientists studying a mysterious and rapidly inflating South American volcano have got the perfect storyline. Researchers from several universities are essentially working as geological detectives, using a suite of tools to piece together the restive peak's past in order to understand what it is doing now, and better diagnose what may lie ahead. It's a mystery they've yet to solve. Uturuncu is a nearly 20,000-foot-high (6,000 meters) volcano in southwest Bolivia. Scientists recently discovered the volcano is inflating with astonishing speed. "I call this 'volcano forensics,' because we're using so many different techniques to understand this phenomenon," said Oregon State University professor Shan de Silva, a volcanologist on the research team. Researchers realized about five years ago that the area below and around Uturuncu is steadily rising — blowing up like a giant balloon under a wide disc of land some 43 miles (70 kilometers) across. Satellite data revealed the region was inflating by 1 to 2 centimeters (less than an inch) per year and had been doing so for at least 20 years, when satellite observations began.
Uturuncu itself is in the same class as Mount St. Helens in Washington state, but its aggressive rise could indicate that a new supervolcano is on the way. Or not. De Silva said it appears that local volcanoes hoard magma for about 300,000 years before they blow — and Uturuncu last erupted about 300,000 years ago. "So that's why it's important to know how long this has been going on," he said. To find an answer, scientists needed data that stretch back thousands of years — but they had only 20 years of satellite data. "So that's where we come in as geomorphologists — to look for clues in the landscape to learn about the long-term topographic evolution of the volcano," Perkins said. Perkins and colleagues used ancient lakes, now largely dry, along the volcano's flanks to hunt for signs of rising action. "Lakes are great, because waves from lakes will carve shorelines into bedrock, which make lines," Perkins said. If the angle of those lines shifted over thousands of years — if the summit of the mountain rose, it would gradually lift one side of the lake — it would indicate the peak had been rising for quite some time, or at least provide a better idea of when the movement began.
Originally posted by x TAM x
Should anyone ever decide to make a show called "CSI: Geology," a group of scientists studying a mysterious and rapidly inflating South American volcano have got the perfect storyline. Researchers from several universities are essentially working as geological detectives, using a suite of tools to piece together the restive peak's past in order to understand what it is doing now, and better diagnose what may lie ahead. It's a mystery they've yet to solve. Uturuncu is a nearly 20,000-foot-high (6,000 meters) volcano in southwest Bolivia. Scientists recently discovered the volcano is inflating with astonishing speed. "I call this 'volcano forensics,' because we're using so many different techniques to understand this phenomenon," said Oregon State University professor Shan de Silva, a volcanologist on the research team.
Researchers realized about five years ago that the area below and around Uturuncu is steadily rising —
blowing up like a giant balloon under a wide disc of land some 43 miles
(70 kilometers) across.
Satellite data revealed the region was inflating by 1 to 2 centimeters (less than an inch) per year and had been
doing so for at least 20 years,
when satellite observations began.
I also suggested that the Earth Core/inner & outer... is the cyclic force that is causing the redistribution of the subsurface Mantle flows & new Mantle Plumes that affect the Earth Crust in ways we can observe