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Martian subsurface volatile concentrations as a function of time: Clues from layered ejecta craters

Barlow, Nadine G. (2004) Martian subsurface volatile concentrations as a function of time: Clues from layered ejecta craters. Geophysical Research Letters, 31 (5). L05703. ISSN 1944-8007


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Publisher’s or external URL: http://dx.doi.org/10.1029/2003GL019075


Martian layered ejecta morphologies are characterized using a new preservation classification system and through measurement of ejecta mobility (EM) ratios. EM, the ratio of ejecta extent to crater radius, is believed to provide information about ejecta material fluidity during emplacement. This study compares EM and preservation classification to d etermine if subs urface volatile concentrations have changed measurably over time. Results from both regional and local analyses suggest that concentrations of subsurface volatiles have remained approximately constant at the depths and over the time periods recorded by these craters.

Item Type: Article
Publisher’s Statement: ©2004. American Geophysical Union.
ID number or DOI: 10.1029/2003GL019075
Keywords: classification; craters; ejecta; emplacement; Extraterrestrial geology; Geophysics; Impact craters; impact features; latitude; layered materials; Mars; Martian surface analysis; mobility; morphologies; morphology; preservation; Rock mechanics; surface features; time factor; water; Mars
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 12 Oct 2015 15:41
URI: http://openknowledge.nau.edu/id/eprint/733

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