Kyushu University in Japan and Kumamoto University researchers on the 16th in the British science magazine published the article said, the latest discovery has hit about 215 million years ago, the largest drop on Earth diameters up to 7.8 kilometers huge meteorite.
Japan Oita Tsukumi strata
Research team in Japan, Gifu Prefecture Osaka wish cho meteorites found traces
According to Japan’s “Sankei Shimbun” reported on September 17, Kyushu University in Japan and Kumamoto University researchers on the 16th in the British science magazine published the article said, the latest discovery has hit about 215 million years ago, fell on Earth diameters up 7.8 km huge meteorite.
Since the study team Gifu Prefecture, Japan and Oita Prefecture strata were found meteorite ingredients, researchers speculate that the meteorite fell on Earth within a wide range. Meanwhile, life on Earth is likely therefore extinction.
The research team has announced that in 2012, in Osaka wish machi Gifu rivers falling meteorite hit the ground found traces; January 2013, also in Oita Prefecture along the coast of the city of Tianjin for a long time also found the wreckage of the same, these wrecks are also containing a metallic element osmium, and the two formations hungry concentrations are high. In general, the surface of the earth element osmium almost non-existent, while the high content in meteorites. The researchers analyzed the isotopic composition ratio, discovery, and there is not the same as Earth’s, which determine a meteorite containing substances.
From previous studies, the type and size of the meteorite and osmium element content have a certain relationship. Thus, according to the discovery of the wreckage of osmium element content, the researchers speculate that the meteorite is about 3.3-7.8 kilometers in diameter.