Gerard-Little, P., Abbott, D., Breger, D. and Burckle, L., 2006, March. Evidence for a Possible Late Pliocene Impact in the Ross Sea, Antarctica. In 37th Annual Lunar and Planetary Science Conference (Vol. 37, p. 1399).
Based on the discovery of possible tektites, impact glass, and other grains that may be impact markers, there is the possibility of a Late Pliocene impact in the Ross Sea, Antarctica.