Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..316n&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 316-318 (SEE N87-23341 16-91)
Physics
Geophysics
Mars Surface, Morphology, Stratification, Stratigraphy, Valleys, Ground Water, Ice, Mars Sample Return Missions, Sediments, Volcanoes
Scientific paper
Thick sequences of layered deposits are found in the Valles Marineris, which exhibit fine, nearly horizontal layering, and are present as isolated plateaus of what were once more extensive deposits. It was argued that the morphology of the deposits is most consistent with origin in standing bodies of water. The conditions necessary for the existence of ice-covered Martian paleolakes are examined in detail and mechanisms for sediment deposition in them are considered. It was concluded that there are several geologically feasible mechanisms that could have led to the formation of thick deposits in ice-covered paleolakes in the Valles Marineris. Present data are insufficient to choose conclusively among the various possibilities. Several types of data from the Mars Observer mission will be useful in further characterizing the deposits and clarifying the process of their origin. The deposits should be considered important targets for a future Mars sample return mission.
Nedell Susan S.
Squyres Steven W.
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