There are no tectonic processes on Venus due to the very thick lithosphere

Researchers used computer models to reconstruct the impact that created Crater Mead, the largest

Venus impact basin.Mead is surrounded by two precipitous faults: a rocky ripple frozen in time by the impact that formed the basin. Models have shown that for these rings to be where they are in relation to the central crater, Venus's lithosphere would have to be quite thick, much thicker than Earth's. This discovery suggests that a tectonic process similar to Earth's, in which continental plates drift like rafts above a slowly churning mantle, was probably not occurring on Venus at the time of the Mead impact.

“Venus probably had what is called"Stagnant lid" during impact, "said Evan Bionnes, Brown's graduate student and lead author of the study. "Unlike Earth, which has an 'active cover' with moving plates, Venus appears to have been a single-plate planet, at least before this impact."

On Earth, evidence of plate tectonics can be foundWorldwide. There are huge cracks, called subduction zones, where bands of the earth's crust extend into the bowels. Meanwhile, new crust forms in the mid-ocean ridges, where lava from deep within the Earth flows to the surface and solidifies. Data from the orbiting spacecraft revealed cracks and ridges on Venus that are a bit like tectonic elements. But Venus is covered in a dense atmosphere, making it difficult to finally interpret fine surface details.

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