NASA reports that its Perseverance rover has identified evidence that a thick, layered rock sequence on the rim of Jezero Crater formed through repeated asteroid impacts. The deposit, described by the science team as the “Broom Point member,” is about 245 feet (75 meters) thick and consists of stacked bedrock layers. Based on the rover’s observations, the formation is likely more than 3.9 billion years old, which would place it among the oldest terrain examined by a Mars rover. The layered structure is interpreted as a record of multiple impact events that built up the rock stack over time. NASA’s findings emphasize the significance of dating and interpreting this ancient crater-rim material, which helps scientists reconstruct Mars’ early impact environment and geological history. The Phys.org report relays the same core results: the thickness and layered nature of the rock unit, its association with asteroid impacts, and the likely age exceeding 3.9 billion years. Overall, the accounts describe Perseverance measurements that support an ancient, impact-driven origin for the Broom Point member at Jezero Crater.