![]() ![]() Whatever caused the purported landslide remains lost in translation. Then in a lab, they triangulated multiple methods of dating and analysis including carbon dating, cosmic ray testing, and “analyzing quartz to see when it was last deformed by an event such as a landslide.” The team first used helicopters to harvest sediment samples from locations at varying altitudes on the peak. Incredibly, the team “reconstructed” the way Annapurna IV’s peak looked back in 1190, Eos said. As Eos reported, the researchers suggested events on this scale might occur on the world’s highest mountains every few hundred thousand years. You’d be hard-pressed to hear of another one in your lifetime, or anywhere in recorded history. Twenty-three cubic kilometers of Annapurna IV calved off, they calculated, which is a volume one glacial geologist called “unheard of” for a landslide. Lave’s team says those early researchers were right. The amount of infill suggested it could be more than typical glacial sedimentation. Yet still, scientists knew as early as the 1980s that the substrate at the foot of the peak had arrived there from some kind of significant landslide. This tends to give its surface better durability. It’s a “Teflon Peak,” the scientists say, meaning material that would normally stick to a formation instead slide off it. At least, mountains that are smaller than substantial, steep Annapurna IV (7,524m). In it, lead author Jerome Lave theorizes a scenario in which a “glacial buzz saw” gradually pulls mountains down. The paper appeared recently in the journal Nature. It was so comprehensive that if it would have occurred today, it would have buried Pokhara –- Nepal’s second-most populated metropolitan area with around 600,000 residents. The cataclysm happened all at once, new research claims. In the year 1190, something unusual happened: Annapurna IV fell down.
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