Shulou(Shulou.com)11/24 Report--

Original title: "Shh, I am digging" seafood "in the plateau!" "

Seafood is delicious, but it is expensive in the interior, and it is often not fresh enough. It can be said that seafood is an everlasting pain in the hearts of children living in inland areas. However, seeing this title, many people may have begun to swear: "how is it possible to dig seafood on the plateau? isn't that nonsense?" Ahem, classmate, don't worry, let me "sophistry" some.

In the movie "the climber" released in 2019, Fang Wuzhou gave Xu Ying a fossil. This is a fossil of marine life from Mount Qomolangma. In 1924, explorers first discovered fossils of marine life embedded in the rocks of Mount Qomolangma. According to people who have been involved in climbing Mount Qomolangma, "you may pick up a fossil conch at any time in a mountain camp a few kilometers above sea level."

Hearing about explorers and scientists digging seafood on the plateau, you should believe that I am not talking nonsense? But you may have a new question: good boy! Could it be that all the marine life hundreds of millions of years ago were Kun Peng?! It can still rise to 90,000 miles! What is that fossilized marine life? How did these fossils that originally existed in the ocean get to Mount Qomolangma?

Let's look at the first question first. If we want to understand what marine fossils are, we need to talk about fossils first. To put it simply, fossils are the "stones" of the remains or remains of creatures living in the distant past. Then the marine fossils are the "stones" formed by the fossilization of the dead bodies of creatures originally living in the ocean and the surrounding sediments.

Nautilus fossils in the eyes of scientists, these ancient marine fossils are "living words" to write the history of geological changes. From the fossils we can see the appearance of paleontology, infer their living environment and living conditions, reconstruct palaeogeography and paleoclimate, and understand the evolution of organisms from ancient times to the present. According to the fossil record, we can also divide and compare strata, explain geological structural problems, and so on.

Trilobite fossils the creatures that once existed indicate the way they have traveled and tell us the stories of the vicissitudes of life. The marine fossils found by explorers and scientists on Mount Qomolangma are witnesses to the violent crustal movement in the Himalayas.

Fossilized sea urchins point the way to explain the second problem.

According to the geological survey, the site of Mount Qomolangma was a vast rough ocean, the ancient Himalayan Sea, more than 200 million years ago. The waters of today's Atlantic and Pacific oceans can be connected to each other through the ancient Himalayan Sea and the Ancient Mediterranean (Tethys Sea). In the middle of the Neogene Miocene, 1200-2500 years ago, a large-scale orogeny occurred in the crust here *-the Indo-Pakistan plate (Indo-Pakistan subcontinent) on the south side of the ancient Himalayas moved northward and played "sticking" with the Eurasian plate (Eurasia) in the north. As a result, the Eurasian continent was swollen and half of its face was swollen, and the Tethys Sea shrank into the present Mediterranean Sea. Nothing is worse than the ancient Himalayan Sea. Directly bumped into a "big drum bag", that is, today's Himalayas, staged a scene of "mulberry sea into vicissitudes of life". The creatures in the ocean never expected that the "sea view room" they were used to would one day become "mountain view houses" and live a frozen life on the plateau. They could only silently sigh: things change.

What is even more amazing is that the rock formations containing fossils of ancient marine life have not been excessively destroyed in the orogeny, and the fossils in them are naturally still intact. They are the best witnesses in the history of the earth, recording everything silently, and now appear as fossils to tell us the story of the past.

In the next hundreds of millions of years, as the process of "sticking" between plates continues, the Himalayas will continue to grow, with an average increase of 20-30 meters per 10,000 years. Mount Qomolangma is located in the mountains of the Himalayas. naturally, it also rises with the rise of the Himalayas. However, with the increase of height, the weight of Mount Qomolangma increases sharply, and eventually its own structural strength will not be stable. Gravity will cause Mount Qomolangma to collapse, and then continue to rise and then collapse. Until the Indian Ocean plate and the Eurasian plate separate again, the entire Himalayas where Mount Qomolangma is located are likely to return to the embrace of the sea. At that time, marine creatures may be able to return to their familiar "sea view room" ~

When you see Mount Qomolangma, pick up your little hoe and dig around your house to see if there is any "bushi".

* orogeny: the pressure of one plate on another (usually the ocean plate crashing into the continental plate) leads to the fracture of ocean rock plates, which are stacked on top of each other in the process of pushing. Over millions of years, they piled up and mountains formed.

This article comes from the official account of Wechat: stone popular Science Studio (ID:Dr__Stone), author: Zhixing

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