Traces of two lakes found in Martian crater Jezero
World
Analysis of radar data showed that in most of the areas studied by the rover at the bottom of the crater there are four parallel layers of rocks. Two of them are similar in structure to sediments at the bottom of terrestrial lakes, and the other two separate these layers and consist of pebbles, debris and other traces of erosion.
Mars rover Perseverance studied the structure of sediments at the bottom of the crater Ezero with the help of radar and found evidence that in this notch on the surface of Mars there were two lakes in different geological epochs. The press office of the University of California at Los Angeles (UCLA) reported that.
The report says that the RIMFAX radar installation installed on board Perseverance detected two layers of lake sedimentary rocks located between sediments resulting from the action of various forms of erosion. These traces of the existence of lakes are very similar to what similar rocks look like on Earth, which confirmed the hypothesis that these bodies of water existed in the crater Jezero.
This conclusion was reached by a group of American and European planetologists led by UCLA professor David Page when studying the data that were collected by the Perseverance rover between May and December 2022. During that time, NASA's fifth rover travelled between two regions at the bottom of the Jezero crater, which scientists called "Hawksbill Gap" and "Nooksack Ledge".
As the scientists explain, these areas are quite a long distance apart, about 700 metres, and yet they are in different regions of the crater floor, one of which was the presumed bottom of an ancient dried-up lake and the other a delta of a Martian river flowing into it. Scientists took advantage of these differences to comprehensively study the structure of sediments on the bottom of the crater Jezero with the help of the RIMFAX radar installed on board Perseverance.
Analysis of radar data showed that in most of the areas studied by the rover, four parallel rock layers are present on the bottom of Jezero crater. Two of them are similar in structure to sediments at the bottom of terrestrial lakes, and the other two separate these layers and consist of pebbles, debris and other traces of erosion. The existence of these layers indicates that in different geological eras there were two different lakes at the bottom of the Jezero, the boundaries of one of which changed significantly over time.
The report says that the RIMFAX radar installation installed on board Perseverance detected two layers of lake sedimentary rocks located between sediments resulting from the action of various forms of erosion. These traces of the existence of lakes are very similar to what similar rocks look like on Earth, which confirmed the hypothesis that these bodies of water existed in the crater Jezero.
This conclusion was reached by a group of American and European planetologists led by UCLA professor David Page when studying the data that were collected by the Perseverance rover between May and December 2022. During that time, NASA's fifth rover travelled between two regions at the bottom of the Jezero crater, which scientists called "Hawksbill Gap" and "Nooksack Ledge".
As the scientists explain, these areas are quite a long distance apart, about 700 metres, and yet they are in different regions of the crater floor, one of which was the presumed bottom of an ancient dried-up lake and the other a delta of a Martian river flowing into it. Scientists took advantage of these differences to comprehensively study the structure of sediments on the bottom of the crater Jezero with the help of the RIMFAX radar installed on board Perseverance.
Analysis of radar data showed that in most of the areas studied by the rover, four parallel rock layers are present on the bottom of Jezero crater. Two of them are similar in structure to sediments at the bottom of terrestrial lakes, and the other two separate these layers and consist of pebbles, debris and other traces of erosion. The existence of these layers indicates that in different geological eras there were two different lakes at the bottom of the Jezero, the boundaries of one of which changed significantly over time.
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