article_snippet.sent: their believe that when a big rock smashes into Earth at high enough velocities, the collision causes the crust temporarily to act like a liquid, first forming a so-called transient crater (like the indentation that forms on a lake surface after a rock is thrown in), and the center rebounds, or splashes, upward and then outward. '
article_snippet.sent: We think the peak ring is the record of the material that rebounded and splashed outward,' Sean Gulick told Live Science.
article_snippet.sent: We've never gotten a rock back from a peak ring to know if that's correct,' Sean Gulick said.
article_snippet.sent: Researchers believe that when a big rock smashes into Earth at high enough velocities, the collision causes the crust temporarily to act like a liquid, first forming a so-called transient crater (like the indentation that forms on a lake surface after a rock is thrown in), and the center rebounds, or splashes, upward and then outward.