Why are large rayed craters are young features?

Large rayed craters are considered young features because they exhibit well-preserved ray systems made of ejecta materials that have not been significantly eroded or obscured over time. The rays consist of bright, contrasting materials that were ejected during the impact event, indicating a relatively recent formation. Additionally, the lack of significant wear or degradation suggests that these craters formed after major geological processes, such as volcanic activity or tectonics, had diminished on the surface. This geological youthfulness is typically indicated by a lack of superimposed craters, reflecting their more recent impact history.