Evidence for extensive denudation of the Martian highlands
Brian M. Hynek, Roger J. Phillips May, 2001 Geology v 29, p407-410
This article from Geology uses Viking images and Mars Orbit Laser Altimetry data to map geomorphic features from Margaritifer Sinus to Northern Arabia Terra. This area appears to have experienced extensive denudation between 350 and 500 million years ago. The morphology, calculated rate of denudation and extensive nature of upland degradation suggest that precipitation-fed surface run-off is the most likely geomorphic agent, leading the authors to conclude that Mars must have been wet and warm during the late Noachim Epoch.
