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. Author manuscript; available in PMC: 2021 Aug 20.
Published in final edited form as: J Geophys Res Planets. 2020 Mar 10;125(7):e2019JE006190. doi: 10.1029/2019je006190

Figure 9.

Figure 9.

(a) Locations of Stratified Basement Unit (SBU) outcrops within the study area shown in white dots. Gray rectangles are HiRISE footprints. Locations B, C, and D refer to the position of panels (b)–(d). (b) SBU outcrop within the wall of the fossae. Block arrows show the location of two faults causing the offset of layers within the Stratified Basement Unit from HiRISE ESP_019476_2005. (c) Examples of similar SBU outcrops with multiple layers in northeast graben wall from HiRISE ESP_032227_2040. (d) Example of SBU within the wall of the fossae from HiRISE ESP_016153_2005. Blue arrows point toward bluish layers in HiRISE color. Here, Fe/Mg-smectite-bearing layers appear white. Note that bluish layers and SBU appear to be interlayered. Apparent folding in outcrops is the result of exposure and not a result of deformation (see section 3.2.1).