90,000 meters of water pressure under the sea is enough to instantly crush human bones and even metal. At present, mankind has not found any 90,000 meters below the mysterious creatures, in reaching more than 6,000 meters has only a few fish, and are invertebrates, and is no eyes, can only rely on the body's cells to sense the outside world of all things, even if the LED flash will not be seen.
Even if 6,000 meters deeper, the water pressure of the deep sea will become the most crowded state of the Beijing subway 100,000 times, which can be thought of under the sea 10,000 meters below the place how horrible, where the pressure is enough to instantly flatten a person.
Scientists believe that at 8,200 meters below there can no longer be any fish survival, because here there is no oxidized trimethylamine, which is essential for deep-sea fish, if there is no can not survive under high pressure. Currently, the deepest seabed discovered by mankind is the Mariana Trench, 11,929 meters deep, and the deepest mankind has ever dived is 11,000 meters, by the U.S. Poseidon to complete the task, but also honorably killed in the line of duty.
The structure of the seabed:
1, the continental shelf under the sea
The continental shelf is a natural extension of the land to the sea. The original coastal plain was submerged by the sea, it became the continental shelf shallow sea. Continental shelf shallow sea around the land like a wreath, but it has a total area of 27.5 million square kilometers, equivalent to the area of the African continent. Most of China's Bohai Sea, Yellow Sea and East China Sea are on the continental shelf.
Fish and shrimp and other seafood, mainly from the continental shelf shallow sea catch, the continental shelf shallow sea aquatic products account for 80% of the entire marine aquatic products. The continental shelf seabed is rich in oil, natural gas, accounting for about 1/3 of the world, and many oil mines on land, but also in the continental shelf seabed environment. The beautiful shallow sea scenery .
2, seafloor spreading
The seafloor has a fairly high ocean "ridge", forming an underwater "mountain range", stretching about 83683.6 kilometers, through all the world's oceans, the bottom of the ocean. The "ridge" is also known as the rift valley, the rift valley constantly out of the magma, magma cooling, in the bottom of the ocean caused a winding undulating newborn underwater mountain range, this process is called seafloor spreading.
These new undersea mountain ranges are called ocean ridges. As new rocks are added to the rift valleys, the rocks on either side of the rift valleys gradually move away from the center of the ridge. So, the farther away from the "mountains" the older the rocks become.
When the ridge and the new undersea plains were formed, the magma in the rift valley continued to erupt, acting as a "conveyor belt" to push a new ridge out of the crustal rock layer, and at the same time slowly push the ridge out of the crustal rock layer down, and re-melted into the mantle, to achieve the balance of new life and growth.