Sugden, a geologist at the University of Edinburgh, was trying to date an ancient volcanic eruption in East Antarctica when he and his colleague uncovered the old ice.

• 爱丁堡大学地质学家苏格丹，与他的同事们在南极东部揭开古冰层时，就试图去测定南极东部某次古代火山喷发的年代。