Improved multibeam swath bathymetry allows targeted coring of glacial landforms aiming at improving our understanding of sedimentary facies that developed in glacimarine settings during the post‐Last Glacial Maximum (LGM) deglaciation. Coupled with radiocarbon dates, we explore foraminiferal records from 18 sediment cores from the western Ross Sea largely from sites near paleo–grounding lines. We investigate post‐LGM foraminiferal assemblages from glacimarine environments, including those proximal and more distal to paleo–grounding lines, including environments influenced by subglacial meltwater outflow and further removed from direct glacial influence and subject to different oceanographic conditions. Agglutinated benthic foraminiferal assemblages dominate open marine facies deposited under the presence of High Salinity Shelf Water and significant primary production, while calcareous foraminiferal assemblages characterize grounding line‐proximal settings, some of which were potentially influenced by Modified Circumpolar Deep Water. Rapid deposition of meltwater plume deposits inhibited and, in some cases, significantly altered foraminifera abundance and diversity. Broadly in the Ross Sea, it appears that the high bathymetric gradient of grounding zone wedges is a key factor promoting rich benthic foraminiferal communities in habitats proximal to grounding lines. Therefore, we demonstrate that paleo–grounding line settings may archive high quality in situ foraminiferal data, which is imperative for paleoenvironmental and geochemical studies on glaciated continental margins worldwide.

中文翻译：

---

南极西部罗斯海冰河沉积物中的有孔虫模式：接地线附近的生活

改进的多波束测深法可以对冰川地貌进行有针对性的取心，目的是增进我们对上冰川期（LGM）冰消后冰川期环境中沉积相的认识。结合放射性碳年代，我们探索了来自西罗斯海的18个沉积岩心的有孔虫记录，这些岩心主要来自古地线附近的站点。我们调查了冰川环境下的LGM后有孔虫组合，包括近古地线和远古地线，包括受冰川下融水流出影响并进一步从直接冰川影响中移除并受不同海洋条件影响的环境。在高盐度架子水和大量初级生产的情况下，沉积的底栖有孔虫组合主导着开放的海洋相，而钙质有孔虫组合则表征了近地线的设置，其中一些可能受到改良的极地深水的影响。融化水羽状沉积物的快速沉积受到抑制，在某些情况下，显着改变了有孔虫的丰度和多样性。在罗斯海中，似乎宽阔的地基楔形水深梯度是在靠近地线的生境中促进丰富的底栖有孔虫群落的关键因素。因此，我们证明了古地线设置可以存档高质量的原位有孔虫数据，