A relatively recent impact event distributed ejecta across the lunar surface. Smaller craters punch through the ejecta to reveal a darker substrate. LROC NAC M139782204LE, image width is 500 m [NASA/GSFC/Arizona State University].
Some boulders are exposed in an impact melt sheet. How can these boulders help geologists understand more about the timing of impact? LROC NAC M1120322807L, image width is 1600 m [NASA/GSFC/Arizona State University].