Mid-Pleistocene cosmogenic minimum-age limits for pre-Wisconsinan glacial surfaces in southwestern Minnesota and southern Baffin Island: a multiple nuclide approach

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

“…For quartz minerals, pairs of 10 Be (half-life 1.4 Ma) and 26 Al (half-life 0.7 Ma) have been used to infer burial durations of hundreds of thousands of years (Bierman et al, 1999;Fabel et al, 2002;Stroeven et al, 2002). This information helps constrain the glacial erosion and quantify the cumulative duration of ice coverage over multiple glacial cycles.…”

Glacial retreat in the Amundsen Sea sector, West Antarctica – first cosmogenic evidence from central Pine Island Bay and the Kohler Range

“…Applying multiple isotopes (e.g. Bierman et al, 1999;White et al, 2011) could resolve if, and how strongly, the samples are influenced by inheritance, which we could not do here due to limited sample material. However, if we look at the problem vice-versa and calculate/model rebound rates necessary to produce the measured amount of 10 Be-concentration, we find rates 17e53% lower than the mean modeled rebound rates from Whitehouse et al (2012a;2012b, and personal communication).…”

Applying the Cosmogenic Nuclide Dipstick Model for Deglaciation of Mt. Washington

“…1). We target boulders as much as possible, given that they are less likely to contain inheritance from prior periods of exposure (Hallet and Putkonen, 1994;Putkonen and Swanson, 2003;Putkonen and O'Neal, 2006;Balco, 2011;Heyman et al, 2011); bedrock is only sampled when boulders are not available because nuclides created during prior periods of exposure can be preserved in bedrock beneath cold-based ice (e.g., Bierman et al, 1999Bierman et al, , 2015Colgan et al, 2002;Briner et al, 2003;Goehring et al, 2008). Our goal is production of a 3D-model of deglaciation of the mountains of the northern New England area to assess ice volume changes over time.…”