Valles Marineris basin beds: A complex story

Mathematics – Logic

Scientific paper

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Canyons, Mars Surface, Planetary Geology, Stratigraphy, Structural Basins, Erosion, Geological Faults, Tectonics, Viking Mars Program

Scientific paper

High resolution stereoimages of the central Valles Marineris enabled detailed geologic mapping on Ophir and Candor Chasmata. Abundant light colored deposits, both layered and massive, fill the chasmata in this region. Units within these deposits were identified by their erosional characteristics and superposition and cross cutting relations. The Valles Marineris beds reflect a history of repeated faulting, volcanic eruptions, and deposition and erosion, resulting in stratigraphic sequences with several unconformities. Because of the preponderance of apparent volcanic deposits inside the troughs, the chasmata may not be simple grabens, but rather giant volcano tectonic depressions. Major events in chasmata development are examined.

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