Surface exposure ages of samples obtained from Reedy Glacier, Antarctica ...

• Main Authors: Todd, Claire E, Stone, John O, Conway, Howard, Hall, Brenda L, Bromley, Gordon RM
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: ipy; Ice measurement; International Polar Year 2007-2008 IPY; Antarc*; Antarctica; International Polar Year; IPY; Reedy Glacier; Ross Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.786188; https://doi.pangaea.de/10.1594/PANGAEA.786188

Fresh deposits above the margins of Reedy Glacier show that maximum ice levels during the last glaciation were several hundred meters above present near the glacier mouth and converged to less than 60 m above the present-day surface at the head of the glacier. Exposure ages of samples from five sites along its margin show that Reedy Glacier and its tributaries thickened asynchronously between 17 and 7 kyr BP At the Quartz Hills, located midway along the glacier, maximum ice levels were reached during the period 17-14 kyr BP. Farther up-glacier the ice surface reached its maximum elevation more recently: 14.7-10.2 kyr BP at the Caloplaca Hills; 9.1-7.7 kyr BP at Mims Spur; and around 7 kyr BP at Hatcher Bluffs. We attribute this time-transgressive behavior to two different processes: At the glacier mouth, growth of grounded ice and subsequent deglaciation in the Ross Sea embayment caused a wave of thickening and then thinning to propagate up-glacier. During the Lateglacial and Holocene, increased snow ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...