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Quicksand – what secrets they hide?

12 Jul

sandThe shifting sands have heard all, seen a few, but what are they and what are dangerous, they know one. Quicksand can for a few minutes to absorb animal or human, leaving no chance for salvation, and it turns out, there were cases when the shifting sands of disappearing ships and even entire cities. Quicksand – a terrible and dangerous killer, with whom the person is not able to fight, as well as with volcanic eruptions, tsunamis and earthquakes.
Called a natural phenomenon has a scientific explanation – is the most common sand, underneath which was a source of water, make their way upstairs. Imagine the scene: good weather, sandy beach, a man walking along the beach. It turns out he is a few steps away from mortal danger: under a layer of sand at a depth of several hundred meters underground source of scoring, which makes its way up. Water begins to fill the space between the grains, pushing them and reducing the adhesion between them. As a result, the sand is moving and unsteady.
The density of quicksand than the density of water, a mixture becomes very viscous substance, which gradually pulls the body down. They can not swim, but slowly and gradually move quite realistically. This is a chance for salvation for a man who fell into the quicksand – lug, waving his arms and legs can not, it leads to hardening of the sandy soil around them. The correct behavior – is to lie back, stretch arms wide and try to free his feet from the sand captivity. Then people will be able to swim on the surface of the quicksand swamp and wait for help from the outside.
The place where the hidden quicksand, to distinguish from ordinary, hard soil is difficult. Sun is generally well dries the top layer of muddy surface, which leads to the formation of a thin layer of dry land on which grass begins to grow. That’s produced natural trap that can reach any living creature. Most often, the shifting sands can be found in the low hills on the banks of rivers and lakes.
Quite a lot of dangerous places was in England, most of which today are bombarded. Notorious Gulf Morkembe, where over the years have killed more 150 people. During low tide the sea recedes in the area far from the coastline, while the bottom dries out quickly, creating the illusion of security. People walking on the dried surface, fall into the trap of shifting sands, and the rapid tide, which rises to 9 meters, covers accidents to the head.
To protect people from this danger, the British government in the 15th century put into this area of ​​the conductor position, which was to protect travelers from treacherous place. Today in the Gulf there is a special Rescue Service, whose mission is to help the affected people. Annually, they save about 30 people affected by the quicksand.
Lifeguards are organized and in Alaska to patrol the fjord Tarnegen, which has a length of 80 kilometers and consists entirely of quicksand. A Sable Island in the Atlantic Ocean is renowned for being there in the shifting sands of die entire ships, trapped on land during the shipwreck.
Another place where the sand absorbs the ships – a cape of South Foreland (England), where the Gudvinskie grounded, well-known as the “graveyard of ships.” There, on the vast shoals, are poluzasypannye ships. In some places, among the gray-yellow sand, stick only the remnants of masts and rusty pipes of old explorers of the seas. It is sad to see how live out his life among the ships , sandy silence . Sands tenaciously hold their prey, and the ship is almost impossible to save, and people do not always have time to leave the doomed vessel.
One of the victims was Gudvinskih sand steamer “Helena Modzheska” cargo is estimated at $ 3 million. September 12, 1946 the ship ran aground off the southern cape of South Foreland. Four days of eight tugboats tried to save the rescue boat, but on the fifth day of the “Gehlen Modzheska” broken in half, and cargo and the ship became a victim of the sand. The captain could not cope with the tragedy of September 17 and shot himself in his hotel room.
In 1954, this place quicksand engulfed lighthouse, which the court warned of the danger. The tragedy happened so fast that it flew the helicopter managed to save only one working with almost left in the sand tower. And there are stories about this black spot is very, very much.
Conventional sand become quicksand for another reason – as a result of the earthquake . When the solid areas of land for a short time turned into quicksand, not only killing people and ships, but the whole city.
So in 1692, died Port-Royal in Jamaica. As a result of a major earthquake most of it went under water, it absorbed the deep. Since that time, experts thought. 300 years of the tragedy of interested scholars and found that the city has not gone under water and drowned in the quicksand. After the earthquake ground again solidified and buried alive in his more than 2,000 residents.
There is yet another scientific opinion on the origin of the quicksand. Some scientists believe that not only water and seismic activity affect his mobility, but also the electrical effects that lead to the formation of positive charge between the particles of sand, which in turn reduces the friction between them. And if a man set foot on this sand, it will fail .

 
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Posted by on July 12, 2011 in Mysterious, Nature

 

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