NASA's Perseverance rover has probably found the oldest rocks at its landing site in the Jezero crater on Mars. Scientists note that the samples are of volcanic origin and can be the product of an ancient lava flow.
The rover discovered the rocks on the crater's floor, where it successfully landed in February 2021. Scientists chose Jezero for research since satellite images of the site indicated it contained a delta – a structure of silt and sand deposited by a river as it enters a broader body of water, such as a sea or a lake. Scientists suspected that there could be a lake with certain life forms earlier.
The rock samples will be delivered to Earth in the next decade so that scientists can establish their exact age.