Age of the Ørkendalen moraines, Kangerlussuaq, Greenland: constraints on the extent of the southwestern margin of the Greenland Ice Sheet during the Holocene

Holocene evolution of the western Greenland Ice Sheet: Assessing geophysical ice-sheet models with geological reconstructions of ice-margin change

“…2; Kelley et al, 2012;Young et al, 2013b). Finally, the Ørkendalen moraines, which rest at the ice margin near Kangerlussuaq and are cross-cut by the historical ice limit, are dated with 10 Be to~6.8 ka (n ¼ 9; Levy et al, 2012) and~7.0 ka (n ¼ 7; Carlson et al, 2014). These 10 Be ages are supported by a minimum estimate of~6.8 cal ka BP for deposition of the Ørkendalen moraines based on several radiocarbon ages in the region (Table 2: van Tatenhove et al, 1996).…”

The Greenland Ice Sheet during the last glacial cycle: Current ice loss and contribution to sea-level rise from a palaeoclimatic perspective

“…Terrestrial evidence indicates that the west Greenland margin from about 65°N to 72°N retreated behind its Late Holocene maximum extent sometime during the Middle Holocene (Corbett et al, 2011;Levy et al, 2012;Young et al, 2013aYoung et al, , 2013bCarlson et al, 2014), as did most of the north and east Greenland margin (Young and Briner, 2015) (Fig. 8).…”

Impact of glacial activity on the weathering of Hf isotopes – Observations from Southwest Greenland

“…920 range of minerals with variable weathering susceptibility, could be more prone 933 to respond to water-rock interaction time, it seems unlikely that the underlying 934 processes for Sr and Hf isotopes are completely different. In addition, the lake 935 sample measured in this study is most likely strongly influenced by weathering 936 of long-exposed proglacial material, as it is situated west of the Ørkendalen 937 moraines, which are 6.8 kyrs old (Levy et al, 2012). Nevertheless, the lake 938 yields a Hf isotope composition similar to glacial samples (Fig.…”