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. 2021 Jul 28;11:15340. doi: 10.1038/s41598-021-94695-3

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Age scenarios for unit L from the site of Thomas Quarry I. W2–W5: periods of higher than average dust supply from the western Sahara. L1, L5 (a,c): subunits with relatively high chemical weathering. Saharan dust proxy record from ODP Site 659 (dust accumulation rate)³³. Saharan dust proxy record from ODP Site 967 (IRM@AF)^34,35. Marine Isotopic Stages (MISs) and LR04 benthic stack²³. Drawing J.-P. Degeai. This figure was created with Adobe Illustrator CS6 version (http://www.adobe.com).