Fig. 2: Three-dimensional view of study area with stacked elevation profiles.
From: Dichotomy retreat and aqueous alteration on Noachian Mars recorded in highland remnants
a, A perspective view of the Arabia–Chryse dichotomy region from merged HRSC67/MOLA68 DTM, (10× exaggeration) showing the southern highlands (brown) and northern lowlands (teal). A total of 10,168 mounds12 are shown in black. The −3,000 m contour (dashed burgundy) shows the relationship between the mounds and a line of constant elevation. Transect lines (number reduced for clarity) for b are shown. b, A histogram showing elevations from 118 topographic transects. Along-stack locations and elevation ranges of bright-toned mound exposures are shown in yellow. Elevation ranges of phyllosilicate minerals on the highland plateau are shown in cyan (Al smectites) and orange (Fe/Mg-smectites), graphically demonstrating the clay compositional stratigraphy common to Noachian-aged terrains5,7,41,69,70. A normalized version where vertical fault-derived displacements in the lowlands have been removed is shown in Extended Data Fig. 1.
