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. 2017 Dec 1;17(12):1233–1264. doi: 10.1089/ast.2017.1657

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© Dorothy Z. Oehler and Giuseppe Etiope, 2017; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons Attribution Noncommercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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FIG. 9. — Potential martian spring deposits (A–B) and comparisons with terrestrial spring mounds (C–D). (A) HiRISE image of elliptical albedo features (arrows) interpreted as spring deposits in Arabia Terra (Allen and Oehler, 2008). (B) HiRISE image of northeast feature from (A) illustrating details of morphology. (C) Active spring mound with apical vent in the Dalhousie spring complex in Australia. (D) Extinct spring mounds in the Dalhousie complex, showing elliptical shapes and concentric tonal halos. Centerpoints: (A) 5.64°N, 355.60°E; (B) 5.64°N, 355.60°E; (C) 26.45°S, 135.50°E; (D) 26.51°S; 135.50°E. Image credits: (A–B) NASA/JPL/University of Arizona; (C–D) Google, 2016 CNES/Astrium.