Figure 8
From: Evidence of an oceanic impact and megatsunami sedimentation in Chryse Planitia, Mars
Schematic reconstruction showing the history of megatsunami formation and modification in the Chryse Planitia region. (a) Pohl crater forms within a shallow marine environment, (b) triggering megatsunami water and debris flow fronts. (c) The wave fronts extensively inundate the highland lowland boundary plains, including a section ~ 900 km southwest of the impact site. (d) The ocean regresses to ~ − 4100 m, accompanied by regional glacier dissection, which erode the rims of Pohl and other craters. (e) The younger megatsunami overflows Pohl and parts of the older megatsunami. Glaciation continues, and mud volcanoes later source and emerge from the younger megatsunami deposit. (f) ~ 3.4 billion years later, the Viking 1 Lander touches down on the edge of the older megatsunami deposit.
