Traces of major collisional events in the asteroid belt in late Eocene marine sediments in Italy
Based on extraterrestrial chromite grains (63–355 μm) in late Eocene sediments, the Chesapeake Bay impact crater (northeastern United States; 40–85 km diameter) likely formed from an H-chondritic projectile. This impact occurred 10–20 k.y. after the formation of the Popigai crater (Siberia, Russia; ∼100 km). The craters formed at the peak of a 2-m.y. period with a factor of 3–5 enhanced flux of 3H
