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. 2016 Nov 17;7:13554. doi: 10.1038/ncomms13554

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Fragments dubbed Norma Luker (MI image, sol 1291) from the disturbed outcrop seen in Fig. 1d display a texture like that of El Tatio sinter breccia in b. (c) Another disturbed outcrop fragment, dubbed Innocent Bystander (MI image, sol 1251), displays microporosity and possible coated grains like that of the underside of El Tatio silica nodule in d. (e) The variably textured surfaces of Elizabeth Mahon (MI image, cropped from Fig. 3e) are similar to those of El Tatio silica nodule in f, which is the topside of the one shown in d. White scale bar represents 1 cm and applies to all images.