Generally we mean quick sand - when sand , mud or gravel comes close to the flow of ground water , the frictional force in the grains of sand or gravel decreases , and the sand or soil cannot withstand the load - this is called quick sand. Water is not only above the soil but also below the soil. This phenomenon of naturally occurring groundwater occurs in two ways. 1- Flowing underground water / spring 2- Earthquake . This trapped water moistens the soil around it. In this way the friction between the sand molecules at one stage decreases and the sand behaves like a water molecule. This wet sand goes to a stage where it cannot take the pressure of any heavy object. When you put something in solid water , it sinks immediately and if you put something in quicksand, it sinks slowly. This is basically the scientific explanation. This is the kind of thing we see on the beach. If one is standing in the sand of the sea , then after a while it will be seen that slowly his feet are sitting in the sand. It is also a kind of small quicksand. However, the depth of such quicksand is only a few inches. So in those places only our feet will sink. However, the places where its depth is more, those places are very scary. Such a hole mixed with quicksand water and liquid mud , once you step into its trap, there is no salvation. You have to sink slowly into the sand. The more you move, the more the body sinks. The quicksand is usually hidden inside the sand mixed with mud on the river or beach. If a person goes near the edge of the hole , the sand gradually moves under the pressure of the body. As a result, people can't come up even after hundreds of attempts. After falling into the quicksand, if you try to get up from there, you have to sink faster under the pressure of the body. If no one comes forward in time, that person will surely die. However, most quicksands are not usually deadly. But it is a strange wonder of nature. Where there is more water , there is more possibility of quicksand. Such as swamps , rivers , canals , beaches and wetlands. Where there is groundwater, there may or may not be quicksand. If you are stuck in quicksand, you can't be impatient at all. If you throw your arms and legs impatiently, you are more likely to get stuck. Everyone should remember , quicksand but much thicker than water. So it is much easier than floating in quicksand. If there is any heavy object with it then it should be left. This is because heavier objects can pull down more quickly. The human body density is 62.4 pounds per cubic foot. The density of quicksand is higher than that of water. In other words, if people can float in water , then they can easily move in quicksand , since the density of quicksand is more than water. So if you fall into the quicksand, you can't move at all. The more movement there is, the greater the risk of drowning. The quicksand doesn't just stay on the beach. On the banks of the river , in the vicinity of the haor. The depth of most quicksands is shallow. After a little diving, the feet may get stuck on the floor. If not , it means that if the quicksand is too deep then there is a possibility of complete submergence. In that case , just like the way we swim in water, we have to make our body as horizontal as possible. Then you have to swim very slowly and try to get out of the quicksand. If there is any other person with him then he should be told to throw the rope from a safe distance and this rope can be used to slowly climb out of the quicksand. Chorabali has contributed a lot to geology. There has been quicksand on earth since prehistoric times. At that time, the carcasses of the animals that died trapped in the quicksand turned to rotting fossils in the ground. The dinosaurs have been featured in the famous Hollywood movie 'Jurassic Park' or 'King Kong'. We have come to know about these dinosaurs or other animals from their fossils at the present time. And these fossils we got from the rocks of that time. In fact, these animals got stuck in the quicksand and sank to the ground. Trapped in the ground , their remains are spared the damage. This quicksand gradually turned to rock after millions of years.