A) Record of the Marine Isotopic Stages (MIS, in bold letters) during Quaternary based on Railsback et al., 2015. https://railsback.org/Fundamentals/SFMGSubstages01.pdf; Lisiecki and Raymo, 2005). The chronological emplacement of the Krafla rhyolitic activity (Kr) recognized or interpreted from the marine core and field data records are compared to the two potential periods for the Halarauður ignimbrite setting (yellow). Grίmsvötn Saksunar tephra = Grim Sak (see text), Kvíar indicates the main setting periods for MIS 5 rhyolite (located on both banks of the Jökulsá á Fjöllum river. VPDB: 13C/12C isotope ratio for Vienna Peedee belemnite. B) The δ¹⁸O record of the Greenland ice core NGRIP between 60 and 125 ka (NGRIP Members 2004) on the GICC05 model time scale (Andersen et al., 2004; Svensson et al., 2008). GI = Greenland interstadial; GS = Greenland stadial. The temperature shift between stadial and interstadial is accorded to Landais et al. (2005) and Capron et al. (2010). Original data was downloaded from https://www.iceandclimate.dk/data. Onset of the Southern Hemispher (SH) warming reveal a potential arrival of the mild Irminger current in the Greenland Strait.