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Thread: The surface of Venus

  1. #1
    Join Date
    Sep 2004
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    South Carolina
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    The surface of Venus

    Thick lithosphere casts doubt on plate tectonics in Venus's geologically recent past. At some point between 300 million and 1 billion years ago, a large cosmic object smashed into the planet Venus, leaving a crater more than 170 miles in diameter. A team of Brown University researchers has used that ancient impact scar to explore the possibility that Venus once had Earth-like plate tectonics. For a study published in Nature Astronomy, the researchers used computer models to recreate the impact that carved out Mead crater, Venus's largest impact basin. Mead is surrounded by two clifflike faults—rocky ripples frozen in time after the basin-forming impact. The models showed that for those rings to be where they are in relation to the central crater, Venus's lithosphere—its rocky outer shell—must have been quite thick, far thicker than that of Earth. That finding suggests that a tectonic regime like Earth's, where continental plates drift like rafts atop a slowly churning mantle, was likely not happening on Venus at the time of the Mead impact.

    https://phys.org/news/2021-01-thick-...ics-venus.html
    Do good work. —Virgil Ivan "Gus" Grissom

  2. #2
    Join Date
    Dec 2020
    Posts
    153
    'the researchers used computer models to recreate the impact that carved out Mead crater, Venus's largest impact basin.' - as for me such kind of research is not very accurate as was with the phosphene they found in the atmosphere which now doesn't prove there is a life there, so I am waiting the next year when this particular research will be criticized.

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