The delta of the Jezero Crater has a distinctive geometry that we can see in the pictures. The instruments must be calibrated and released, and the rover must move from the landing site to the part with scientific instruments visible on the scene. In the case of the persistent rover, testing of the drone was delayed by several weeks.
But this week was a pleasant surprise, as the first research paper from Perseverance in Science was published. It turns out that some of the early images of the rover show features in some of the almost vertical rock walls some distance from the descent - details that tell us the history of the water flow into Jezero crater. Mars meets Kodiak
Jizzero crater was chosen as the landing site for the Perseverance because orbiter images show it once hosted a lake. The images showed an outlet channel allowing water to pass through cracks in the crater walls, where rivers flowed to feed the lake, and what appeared to be river deltas flowing from these places into the crater. Search. Specifications for the rover's mission include sampling that delta, which may once have been home to living and collecting any living matter that was already upstream.
They can also be an important part of this task. confirms that these sediments are indeed produced by the river deltas. The new article is about this and goes beyond revealing the type of delta that formed the sediment near the rover's landing site. , Kodiak Boot, and a large Delta sediment fan. NASA rover images trace the history of a Martian crater lake> Zoom NASA/JPL-Caltech/University of Arizona/USGS Its current position relative to the crater floor is approximately equal to that of the larger delta fan adjacent to the crater wall, indicating that it was once part of a formation, but the material The one you linked has since eroded.
It is important to note that in the larger delta fan, the details of the earlier delta structure were obscured by mounds of debris, making them difficult to interpret. They have been cleared from under the rubble, which means they can be seen, and since these rocks are almost vertical, it is impossible to see them from orbit, but the Endurance was able to take excellent pictures. obtained from them. And those pictures became very clear.
In the areas of Kodiak not covered by debris, the general direction of the sediment layers can be detected, the sediments currently forming the body of the buttocks. These layers show a consistent pattern. At the base, the strata have a semi-flat or slightly sloping slope. In the upper part there are areas where the layers are significantly inclined vertically. And the second part is almost horizontal with the second layer.
This type of sediment has already been described in the ground, giving rise to a river delta. Lower layers form at the bottom of the lake as new sediment moves inward and settles almost evenly. As the upper delta moves toward the lake, the sediment tilts vertically and the sediment moves down the slope formed at the edge of the delta. As the water flows over the delta, the sediments begin to form almost horizontal layers again.ad
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