Timothy J. Parker

TL;DR: Parker et al. as mentioned in this paper considered the formation of the outflow channels and valley networks discovered on the Martian northern plains during the Mariner 9 mission and suggested that geological processes capable of producing similar morphologies on earth, lacustrine or marine deposition and subsequent periglacial modification offer the simplest and most consistent explanation for the suit of features found on Mars.

TL;DR: In this article, the authors examined the west Deuteronilus Mensae region of Mars and noted the changes in fretted terrain across the gradational boundary from uplands to lowlands to include a reduction of canyon wall slopes and depths.

TL;DR: The Microscopic Imager (MI) on the Mars Exploration Rover Opportunity has returned images of Mars with higher resolution than any previous camera system, allowing detailed petrographic and sedimentological studies of the rocks and soils at the Meridiani Planum landing site as discussed by the authors.

TL;DR: The final four landing sites showed strong evidence for surface processes involving water and appear capable of addressing the science objectives of the missions, which are to determine the aqueous, climatic, and geologic history of sites on Mars where conditions may have been favorable to the preservation of evidence of possible prebiotic or biotic processes.

TL;DR: The Mars Science Laboratory (MSL) Mars Hand Lens Imager (MAHLI) as mentioned in this paper was used to investigate the stratigraphy and grain-scale texture, structure, mineralogy and morphology of geologic materials in northwestern Gale crater.