Origin and evolution of the layered deposits in the Valles Marineris, Mars

Details Origin and evolution of the layered deposits in the Valles Marineris, Mars Origin and evolution of the layered deposits in the Valles Marineris, Mars

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..409n&link_type=abstract

Icarus (ISSN 0019-1035), vol. 70, June 1987, p. 409-441.

Mathematics

Logic

131

Mars Surface, Photointerpretation, Planetary Geology, Stratigraphy, Canyons, Land Ice, Mariner Program, Mars Volcanoes, Viking Spacecraft, Mars, Origin, Evolution, Deposits, Layers, Valles Marinaris, Ice, Description, Thickness, Candor Chasma, Ophir Chasma, Melas Chasma, Morphology, Stratigraphy, Chronology, Grabens, Formation, Erosion, Eolian Effects, Hypotheses, Volcanism, Eruptions, Deposition, Water, Sediment, Transport, Distribution, Sedimentation, Maps, Photographs, Topography, Volume, Spacecraft Obse

Scientific paper

Four hypotheses are discussed concerning the origin of the layered deposits in the Martian Valles Marineris, whose individual thicknesses range from about 70 to 300 m. The hypothesized processes are: (1) aeolian deposition; (2) deposition of remnants of the material constituting the canyon walls; (3) deposition of volcanic eruptions; and (4) deposition in standing bodies of water. The last process is chosen as most consistent with the rhythm and lateral continuity of the layers, as well as their great thickness and stratigraphic relationship with other units in the canyons. Attention is given to ways in which the sediments could have entered an ice-covered lake; several geologically feasible mechanisms are identified.

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