... This is supported by studies based on the ε Nd signatures of the authigenic fraction of marine sediments and of unclean foraminifera (Böhm et al., 2015;Gutjahr et al., 2008;Howe, Piotrowski, & Rennie, 2016;Lippold et al., 2016;Pahnke et al., 2008;Roberts et al., 2010). However, a growing number of studies on ε Nd signatures of the authigenic fraction of marine sediments and foraminifera suggest reduced presence of SSW in the North Atlantic and a much larger fraction of Northern Source Water (NSW) in the intermediate and deep tropical North Atlantic Ocean during the LGM and deglaciation (Casme et al., 2003;Howe, Piotrowski, Noble, et al., 2016;Howe, Piotrowski, Oppo, et al., 2016, Howe et al., 2018Huang et al., 2014;Pöppelmeier et al., 2020;Xie et al., 2012Xie et al., , 2014Zhao et al., 2019). Recently published records of distinctly unradiogenic ɛ Nd signatures prevailing during the early Holocene in areas within and outside of the Labrador Sea Howe, Piotrowski, & Rennie, 2016;Jaume-Segui et al., 2020;Pöppelmeier et al., 2018) were interpreted to result from either enhanced production of LSW (Roberts et al., 2010), enhanced partial dissolution of poorly chemically weathered detrital material deposited in the Labrador Sea following Laurentide Ice Sheet retreat Howe, Piotrowski, & Rennie, 2016;Pöppelmeier et al., 2018), or the admixture of a particularly dense water mass with highly unradiogenic Nd isotope composition to the abyssal Yellow dots indicate locations of surface sediment samples from this study. ...