Chilean Glacial Chronology 20,000 to 11,000 Carbon-14 Years Ago: Some Global Comparisons

• Published in: Science
• Main Author: Mercer, J. H.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Association for the Advancement of Science (AAAS) 1972
• Subjects: Antarctic; New Zealand; The Antarctic; Antarc*; Ice Sheet
• Online Access: http://dx.doi.org/10.1126/science.176.4039.1118; https://www.science.org/doi/pdf/10.1126/science.176.4039.1118

Chilean glaciers at a latitude of 41°S reached a maximum extent about 19,400 carbon-14 years before the present (B. P.), shrank 50 percent by 16,000 years B. P., and readvanced to a smaller maximum after 14,800 years B. P. These fluctuations were closely in step with those of the Laurentide ice sheet east of the Mississippi River but differ somewhat from the accepted sequence in New Zealand. A corresponding pattern is not apparent in the Antarctic paleotemperature curve deduced from changes in oxygen isotope ratios.