Mystery "Rock Walk" in the Valley of Death Revealed
Almost a century movements large rocks in Death Valey mystery. However, it has now been revealed how bati-stone move.
Almost a century stones in Death Valley of Death Valey or into the mysteries of science. Large rocks which on average weigh about 320 kilograms found to migrate. As if magical powers that move from one point to another. These stones as had legs.
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However, this time the scientists are not confused anymore. Questions about the strange phenomenon that has been solved. Could be explained scientifically as well. Thus, there is no magical elements that can not be digested in the human mind shifting process stones are often called 'sailing stones' or 'sailing stones' is.
The mystery was revealed by scientists from San Diego.
The scientists claim to have seen with their own eyes how the stones were moved from one point to another in Death Valley in the territory of the United States.Not easy to do for researchers from the Scripps Institution of Oceanography, San Diego, to get that answer. They never even hope to see the movement of the stones. Because, for decades to make observations, only to find rocks that sit silent over the arid land.
Until at some point they decided to monitor the rocks that by installing GPS on a number of rock and surveillance equipment weather stations that have a high resolution which can measure the ripple of water for one second intervals. The tools were installed at 15 stone there.
This research was conducted in the winter of 2011 ago. Obviously with the permission of the park officials. Head of research, Ralph Lorenz, called the experiment was a study of the most boring ever he did. Because they have to wait for the movement of the stones were no legs.
But in December 2013, Richard Norris, author of the study, as well as cousin Norris, Jim Norris, came to the Valley of Death. At that time they found the lake, which is also called Playa, covered in water with a height of about seven centimeters. Shortly after, they saw a miracle, stones before they move.
"Science sometimes have elements of luck," said Norris. "We expect to wait five to ten years without anything that moves, but only within two years of the project, we just happened to be there at the right time to see for themselves that happen."
From their observations indicate that the rocks were moving it requires a rare combination of events. First, Playa filled with water, which must have sufficient height to float the ice during the nights in winter, but also shallow enough to lift the rock.
At nightfall, the temperature in the region to be down. Pond filled with water that then freezes. Ice sheet was formed, resembling glass windows, which is thin enough to move freely, but it also should be somewhat thick to maintain its strength.
As the day began brightly, the ice begins to melt and then broke up into clumps of floating, with only a thin wind blowing over the vast pool, plus the slippery ice begins to melt, the stones were pushed over the pond. Leaving footprints in the soft mud under the surface.
"On December 21, 2013, the ice broke around noon, with a cracking sound coming from all over the frozen surface. I told Jim, this is it," said Richard Norris.
This phenomenon has reversed previous theories are emerging, such as the strength of storms, dust devils, slippery algae, or thick ice sheet, which affects the movement of the stone.
Instead, the stones were moved leeward spoi-spoi, which blows 3 to 6 meters per second and is driven by the ice thickness is only 3 to 5 millimeters. Size is impossible to lift large boulders. However, thin ice that has reduced friction with the ground.
According to the observations
The rocks were moving slowly, only about 2 to 6 meters per minute. A movement that could barely be seen from a distance. "There is a possibility of tourists actually see this goes unnoticed," said Jim Norris.The stones were moved to another place between a few seconds to 16 minutes. In one occasion, the researchers observed that rock was on the field three times the area of a football field. The stone was moved continuously up to a distance of about 60 meters, before finally stopping.
The researchers believe that the rocks have moved many times before finally reaching the last place. They suspect the last movement before happened in 2006. "So the stones can bergerakhanya millionth time," said Professor Lorenz.
"There is also evidence that the frequency of rock movement, which requires a cold night to form ice, the possibility has been declining since 1970 due to climate change," added Lorenz.
Then, with the findings, whether the mystery stone moves in the Valley of Death has been revealed? "We documented five events rock movement in two and a half months in the pool and some of them involving hundreds of stones," said Norris.
"So we have seen that even in Death Valey, a famous hot, floating ice is a major force in the movement of the rock," added Norris. But scientists have never seen it before large rocks move with mechanisms such as those encountered in this Death Valley.
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