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. 2023 Sep 8;13:13261. doi: 10.1038/s41598-023-39957-y

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© The Author(s) 2023

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/.

PMC Copyright notice

Detailed view of ochre pieces from Porc-Epic Cave. (a) Ochre piece PE17, SFG; (b) ochre piece PE295, SFG; (c) ochre piece PE538, SFG; (d) ochre piece PE913, SFG; (e) ochre piece PE919, SFG; (f) ochre piece PE930, SFG; (g) ochre piece PE987, SFG; (h) ochre piece PE994, SFG; (i) ochre piece PE1635, SFG; (j) ochre piece PE1914, SFG; (k) ochre piece PE1927, SFG; (l) ochre piece PE306, BFG; (m) ochre piece PE521, BFG; (n) ochre piece PE102, HFG; (o) ochre piece PE1419, HFG; (p) ochre piece PE1752, HFG; (q) ochre piece PE1510, CG; (r) ochre piece PE1628, CG; (s) ochre piece PE101, FS; (t) ochre piece PE973, FS; (u) ochre piece PE436, PFG; (v) ochre piece PE1812, PFG. Scale = 5 mm.