Unraveling late Quaternary atmospheric circulation in the Southern Hemisphere through the provenance of Pampean loess

Identifying the provenance and quantifying the contribution of dust sources in EPICA Dronning Maud Land ice core (Antarctica) over the last deglaciation (7–27 kyr BP): A high-resolution, quantitative record from a new Rare Earth Element mixing model

“…In contrast, after 11.5 kyr BP, as no further transgressive-regressive cycles occurred and conditions on the Altiplano were persistently dry (Condom et al, 2004), our record shows an increase of dust contributions. As such, our observations are in line with those of Gili et al, (2017) and Torre et al, (2022) who highlight the role of the Altiplano as a dust supplier during interglacial periods on top of Patagonia's contribution.…”

Loss of loess in the geological record due to poor preservation

“…This confirms the conceptual model of loess being deposited predominantly outside of active sedimentary basins which have acted as sources for windblown dust rather than sinks (Figure 1). A few basins, however, are exceptions as they contain extensive areas of primary loess, including the Andean basins of Argentina (Torre et al, 2022; Zárate, 2003), the Danube basins in Europe (Fenn et al, 2022; Jipa, 2014; Marković et al, 2015), the Central Asian basins (Li et al, 2019; Machalett et al, 2006) and the Songliao basin in northeastern China (Li et al, 2020; Wu et al, 2021). These are all foreland basins formed by nearby uplifts, which could have played an important role in providing abundant silt for the formation of loess (Assallay et al, 1998; Fenn et al, 2022; Li et al, 2020; Muhs & Bettis, 2003; Smalley, 1995).…”

Loss of loess in the geological record due to poor preservation

“…This confirms the conceptual model of loess being deposited predominantly outside of active sedimentary basins which have acted as sources for windblown dust rather than sinks (Figure 1). A few basins, however, are exceptions as they contain extensive areas of primary loess, including the Andean basins of Argentina (Torre et al, 2022;Zárate, 2003), the Danube basins in Europe (Fenn et al, 2022;Jipa, 2014;Marković et al, 2015), the Central Asian basins Machalett et al, 2006) and the Songliao basin in northeastern China (Li et al, 2020;Wu et al, 2021). These are all foreland basins formed by nearby uplifts, which could have played an important role in providing abundant silt for the formation of loess (Assallay et al, 1998;Fenn et al, 2022;Li et al, 2020;Muhs & Bettis, 2003;Smalley, 1995).…”