Guiyang airport toilet sink is covered with fossils! How is this kind of stone distinguished?

The toilets in Guiyang airport are full of fossils! It is an ancient invertebrate, brachiopod, with a large and prominent almost round shell.

Public toilets: On the evening of 28th, a reporter from The Paper interviewed experts on this hot topic and responded to netizens' concerns.

The reason is that Chen Shangbin, director of the Geology Department of China University of Mining and Technology, passed by Guiyang Longdongbao Airport and found a pattern similar to fossil remains on the washboard of the toilet. Chen Shangbin took a photo and sent it to a circle of friends, and then sent it to Weibo, which caused widespread concern.

According to Dr. Qian Maiping, an expert in stratigraphy and paleontology, this is an ostrich fossil dating back 300 million years. After consulting and communicating with Shen, an academician of China Academy of Sciences and a professor at Nanjing University's Institute of Geological Sciences, Dr. Qian Maiping identified the early Silurian shellfish 439 million years ago.

Then, the airport staff replied that the sink was actually the fossil residue they bought. The secretary-general of Jiangsu Geological Society also said that this fossil generation era is far away from us, but it is actually very close to us. The slate of Guiyang airport toilet is produced in Yunnan, Guizhou, Sichuan and other places, and is used as decorative board in many building materials industries.

The stone industry calls it? Shells? The application of brachiopod fossils in the field of building materials is not a patent of Guiyang, and similar stones have appeared in Chengdu, Zunyi and Guilin. According to insiders, brachiopod fossils are not popular in the stone industry, but there are no relevant protection measures.

These fossils are called. Shells? But they are not mollusks. The first thing to note is that these fossils are very different from what we traditionally think of as shellfish fossils.

Brachiopods flourished in Paleozoic. Although both belong to mollusks, they all have two shells, just like bivalves of mollusks, but they are very different. The main difference between fossils is that the single shell of brachiopod is symmetrical on both sides, while the two shells of bivalve are asymmetrical. So, if you find it in the wild? Shells? Fossil, according to its symmetry on both sides, can judge whether it is a bivalve or a brachiopod.

Finally, this fossil is worthless. Please don't destroy public goods with a hammer, knock it down for collection or sell it to make money. As long as you go to the wild, you can find it, and there are many quarries and processing plants. Moreover, in terms of use, it is no different from ordinary marble and belongs to building stone. It can be said that this kind of fossil can be better understood after this report comes out.