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. 2020 Mar 25;20(4):475–499. doi: 10.1089/ast.2019.2044

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© Steven W. Ruff et al., 2020; 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. 1. — Context of the Columbia Hills in Gusev crater. Red-lined inset image depicts the ∼160 km diameter Gusev crater in a mosaic of THEMIS VIS images. The white rectangle (centered at 175.5° E, 14.6° S) is the location of the Columbia Hills shown in the main image, which is cropped from CTX B01_010098_1653_XI_14S184W. Basaltic lava flows have embayed the terrains of the Columbia Hills, implying that they are older than the flows. PR indicates Paso Robles S-rich soil. Yellow rectangle represents the yellow-lined inset image of the Inner Basin (cropped from HiRISE PSP_001513_1655_RED), which contains the Home Plate feature (HP) and two candidates for other Home Plate-like deposits (HPc), and the candidate volcanic vent feature called Goddard (G). Other S-rich soils are indicated at A for Arad and T for Tyrone. CTX, Context Camera; HiRISE, High-Resolution Imaging Science Experiment; THEMIS VIS, Thermal Emission Imaging System Visible Imaging System.