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

Figure 3. Comparison of opaline silica structures adjacent to Home Plate with those of hot spring discharge channels at El Tatio.

Figure 3

(a) Home Plate opaline silica occurs in nodular masses with digitate structures that resemble those at El Tatio (b), at the same scale. Mars scene is cropped from Fig. 1b. White scale bar in a and b represents 10 cm. (c) Home Plate opaline silica digitate structures resemble those at El Tatio (d) at the same scale. The white scale bar in c,d represents 5 cm. Insets highlight notably similar structures. Mars scene is a Pancam ATC image (‘Elizabeth Mahon', sol 1160, P2582). Reddish hues in Mars scenes are due to thin airfall dust accumulation. (e) Grayscale Microscopic Imager mosaic (sol 1157) of a portion of the ‘Elizabeth Mahon' silica outcrop on Mars shown in c has similar structures as those on sample ET1-1A from a hot spring discharge channel at El Tatio (f). The white scale bar in e,f represents 1 cm.