Waiho Loop Moraine left behind by a major advance of New Zealand's Franz losef Glacier. Denton and Hendy (1994) used radiocarbon dating on wood carried by the glacier to show that the glacier was active at 1 1,150 i~50 14C yr. This age is used by Denton as evidence for substantial Southern Hemisphere cooling, close to the time of the onset of the Northern Hemisphere Younger Dryas cold interval (Hajdas et al., 1995). Photo by George Denton.