NASA’s Perseverance Mars Rover team has confirmed that the red planet Jezero Crater was once the site of the Delta Lake system.
In a study published Thursday in a scientific journal, researchers also found that images from Rover, taken three months after Perseverance landed in February, caused the region to experience significant late floods. I wrote that it suggests that I did.
Why NASA’s Mars mission is silent during the week
The images were taken on long, steep slopes called delta cliffs or “cliffs”, allegedly formed from sediments at the mouths of ancient rivers that watered the lake.
The photo revealed that the fan-shaped delta had an outcrop that the team said was not visible from orbit, recording the hydrological evolution of the crater.
The rock outcrop “Codiac” was imaged only from orbit, but the image reveals the strata along the eastern plane, showing the strata that geologists expect to find in the delta on Earth. ..
“The presence of sloping formations on these outcrops is interpreted as evidence of a delta that has advanced to the lake. In contrast, the top fan-shaped formations are rocky deposits that represent temporary high-energy flood deposition. It consists of agglomerates, “the author of the study wrote. “This sequence of sediments represents a transition from sustained hydrological activity in a sustainable lake environment to a very energetic short-term river flow.”
Nicolas Mangold, a patience scientist and lead author of the paper at Laboratoire de Planétologie et Géodynamique in Nantes, France, said in a NASA announcement, “We have never seen such a well-preserved strata on Mars. No, “he said. “This is an important observation that allows us to see at once the existence of a lake and river delta in Jezero. A great benefit from a better understanding of hydrology months before arriving at the delta. You will get the road. “
The photographs that led to these conclusions were taken by Perseverance’s left and right must-cam-Z cameras, in addition to the remote microimager.
The image of Mars shows the working Perseverance Rover
According to NASA, the images also provided the team with insights into the best places to look for samples of rocks and sediments to collect and cache.
Further up the cliff, Mastcam-Z and RMI found stones and rocks that the team said must have been carried by fast-moving flash floods.
“These results also influence the strategy of selecting rocks to sample,” said Sanjeb Gupta, a patience scientist and co-author of the paper at Imperial College London, in a statement. “The finest particle material at the bottom of the delta may contain the best way to find evidence of organic matter and biosignatures. The rocks at the top sample old crust fragments. It makes it possible. Both are the main purposes of sampling and caching. It shakes before the Mars sample return. “
Finally, scientists explained that the water level of Lake Jezero fluctuated tens of yards before it disappeared, but whether the change was due to floods or more gradual environmental changes. Unknown.
The team confirmed that the change occurred later in Delta’s history and that the lake level was at least 330 feet below its maximum.
“A better understanding of the Jezero Delta is the key to understanding the changes in hydrology in the region, and it may provide valuable insights into why the entire planet was dry.” Said Gupta.
NASA believes that Mars dried up about 3.5 billion years ago and the lake existed about 3.7 billion years ago.
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Delta will be the site for the 2022 Rover Team’s second science campaign.
“We now have the opportunity to look for fossils,” Tanja Bosak, an associate professor of geobiology at MIT, told MIT News. “It will take some time before we reach the rock where we really want to sample the signs of life. So it’s a marathon with a lot of potential.”
Existence of Lake Mars, flood confirmed by NASA’s patience team
Source link Existence of Lake Mars, flood confirmed by NASA’s patience team