Confirmed: the river flowed on Mars




Confirmed: the river flowed on Mars


We have previously written that Mars had to be water . Once upon a time, has dried up, or pushed into the ground. Detailed analysis and inspection of the rover’s actions Kyuriositi, or rather plates containing pebbles, studied in the past year, has shown that they were part of an ancient riverbed. These rocks – first found on Mars, where there is a gravel bed. The sizes and shapes of gravel – from grains of sand to a golf ball – allowed the researchers to calculate the depth and speed of the water that once flowed in this place.

“We finished strong quantitative estimates of sizes and shapes of pebbles, which is made ​​up of these conglomerates,” – said Rebecca Williams of the Planetary Science Institute in Arizona. – “Our calculations have converged with those that emerged at the beginning of last fall. At least a trickle flowed at a walking pace, somewhere meter per second, and was ankle-deep and waist-deep in different places. ”

“Our analysis of rounded pebbles provided additional information,” – said Sanjeev Gupta, from Imperial College London, working on the data. – “Rounded point to a continuous stream. They are born when a pebble constantly clash against one another. This was not a disposable flow . He was a regular, clearly, a few weeks or months – or rather difficult to say. ”

Stream carried the gravel at least a couple of kilometers, according to the researchers.

The atmosphere is modern Mars too thin to allow a steady flow of water, even though the planet is stored huge deposits of ice. Some evidence suggests that ancient Mars was much liquid water. Nevertheless, except vysheoboznachennyh rocks, nothing could satisfy the curiosity of scientists. But the image of rocks showed that the atmospheric conditions in the crater Gale once allowed liquid water to flow on the surface of Mars.

Река на Марсе

Kyuriositi rover found evidence of an ancient system of transporting water in several places, including the rock in the photo above, entitled «Hottah». Rounded pebbles in sedimentary conglomerate indicates a steady erasure of stones on the path of the water.

The key evidence of the existence of an ancient stream is the size and rounded shape of the gravel in the channel and next to him. In Hottah found pieces of gravel embedded in the rock, which are referred to as “debris” sizes up to several inches. Some of the debris round, leading to the conclusion of a vigorous flow of water in the past. These stones are too large to be moved the wind. Erosion has led to the fact that the individual pieces of gravel just fell out of the rock, creating a heap of stones.

Over a two-year mission, the researchers took advantage of ten scientific instruments on board Kyuriositi to explore the history of the Gale Crater on Mars, where the rover found a favorable environment for microbial growth.
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Tags: Water , Kyuriositi , Mars .

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