How do erosion, volcanism, and plate tectonics erase impact craters on Earth?

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On Earth, impact craters are frequently obscured or eliminated by active geologic processes, which explains why they are far less common on our planet than on other solid bodies in the solar system. These processes include:12

  • Erosion: This is the dominant force in destroying craters on Earth. Through the hydrologic cycle, water and other environmental factors gradually wear down the crater’s rim and fill the depression with sediment, eventually obscuring the impact site.13
  • Volcanism: Volcanic activity can erase craters by flooding the surface with basaltic flows or other volcanic materials, effectively resurfacing the area and burying the original impact structure.1
  • Plate Tectonics: Earth’s crust is continuously recycled through plate tectonic processes. At convergent plate boundaries, older oceanic crust is subducted into the mantle, where it is destroyed and recycled. This constant renewal of the Earth's surface ensures that older craters are eventually removed as the crust itself is consumed.14

While these processes are unique in their intensity on Earth, volcanic and tectonic activities are also capable of eliminating large craters on other planetary bodies.1