Fig. 2: Marine sedimentary evidence for Laurentide Ice Sheet (LIS) persistence into the Last Interglacial (LIG).
From: North American ice sheet persistence into past interglacials should inform future projections
a Sediment cores with a red layer thought to source from a Last Interglacial Laurentide Outburst (LILO) flood event. White/blue areas denote LIS92 / glacial lake Agassiz-Ojibway100, respectively, at ~ 8.5 ka, prior to the analogous 8.2-kyr event. Red stars denote sediment cores with a red layer marking the LILO event. b Sediment cores with LIG red layer, modified from ref. 22. Cores include International Ocean Discovery Program (IODP) Expedition 303 Sites U1302-C2H6101 and U1305-C4H2102; Ocean Drilling Program (ODP) Leg 105 Site 646-B2H5103,104; Lamont-Doherty Earth Observatory EW9303-37JPC22; and ODP Leg 172 Sites 1063-B4H5105 and 1061-D4H7106. Ages of the red layer—median in bold, 95% credible interval in parentheses, with layer base marked with black lines—are estimated using the BIGMACS stratigraphic alignment library107 (see Supplementary Information). MIS: Marine Isotope Stage. Core images are reproduced without change from the LDEO Core Repository (EW9303-37JPC) and IODP photo archive (all other cores), from which the photos are available on a CC By 4.0 license (https://creativecommons.org/licenses/by/4.0/).
