Evidence for multiple 4.0–3.7 Ga impact events within the Apollo 16 collection
Takafumi Niihara, Sky P. Beard, Timothy D. Swindle, Lillian A. Schaffer, Hideaki Miyamoto, David A. Kring Meteoritics & Planetary Science First published: 22 January 2019 , doi.org/10.1111/maps.13237 LINK “In a histogram of lunar impact ages…