Exquisite layered sandstone exists in Mars Holden Crater

 According to foreign media reports, the layered sandstone of Mars Holden Crater reminds people of the red rock topography of the southwestern United States. This photo was taken by NASA's Mars Reconnaissance Orbiter (MRO) airborne high-resolution scientific experiment imaging camera (HiRISE), showing the presence of eddy layered sandstone in the 140-kilometer-diameter Holden Crater.


　　 On June 8, NASA officials described this photo as saying that most of Mars is covered by sand and dust, but piles of sediment can be seen in some areas. In this photo, the sand layer in the southern part of Holden crater presents a delicate sense of layering. These layered sequences provide important clues for understanding the complex geological history of Mars.


　　 This period of history includes that the surface of Mars in ancient times may support the survival of terrestrial life. The survey data of the Mars Survey Orbiter and the Curiosity rover show that there were rivers and lakes in the ancient times. Some scientists even believe that most of the northern hemisphere of Mars was once an ocean in ancient times(https://www.casualattire.info).


　　 About 4 billion years ago, everything changed. Mars lost the global magnetic field. The once dense atmosphere of Mars was stripped off by solar wind charged particles. Mars gradually became a cold and dry red planet today.


　　 Incidentally, Holden crater was once one of the candidate landing sites for the Curiosity rover, but NASA finally chose Gale Crater with a diameter of 154 kilometers.


　　 Holden Crater is located about 26 degrees south of the Martian equator, while Gale Crater is located only about 5 degrees south of the Martian equator.

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