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Exploring the evidence of Middle Amazonian aquifer sedimentary outburst residues in a Martian chaotic terrain

Kargel, Jeffrey S.; Berman, Daniel C.; Rodriguez, J. Alexis P. +7 more

The quest for past Martian life hinges on locating surface formations linked to ancient habitability. While Mars' surface is considered to have become cryogenic ~3.7 Ga, stable subsurface aquifers persisted long after this transition. Their extensive collapse triggered megafloods ~3.4 Ga, and the resulting outflow channel excavation generated vol…

The Kasei Valles, Mars: a unified record of episodic channel flows and ancient ocean levels

Duran, Sergio; Coulthard, Tom J.

There is widespread evidence across Mars of past flows in major channel systems as well as more than one palaeo ocean level. However, evidence for the timing of channel flows and ocean levels is based on geographically diverse sources with a limited number of dates, making reconstructions of palaeo flows and ocean levels patchy. Here, based on hig…

Knickpoints in Martian channels indicate past ocean levels

Duran, Sergio; Coulthard, Tom J.; Baynes, Edwin R. C.

On Mars, the presence of extensive networks of sinuous valleys and large channels provides evidence for a wetter and warmer environment where liquid water was more abundant than it is at present. We undertook an analysis of all major channel systems on Mars and detected sharp changes in elevation along the river long profiles associated with steep…