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. 2022 Sep 5;22(9):1143–1163. doi: 10.1089/ast.2022.0018

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© Keyron Hickman-Lewis et al., 2022; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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FIG. 1. — Geological and stratigraphic context of the studied Buck Reef Chert samples. Simplified geological map of the Barberton greenstone belt showing the location of the BARB-3 core, from which the studied samples were sourced; inset shows location within southern Africa. Simplified stratigraphic log of the BARB-3 core showing the position of the studied samples within the basinal (F6) and lower platformal (F8, F10) facies. Modified from Greco et al. (2018).