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dc.contributor.authorWatters, Thomas R.
dc.contributor.authorLeuschen, Carl J.
dc.contributor.authorCampbell, Bruce A.
dc.contributor.authorMorgan, Gareth A.
dc.contributor.authorCicchetti, Andrea
dc.contributor.authorGrant, John A.
dc.contributor.authorPhilips, Roger J.
dc.contributor.authorPlaut, Jeffrey J.
dc.identifier.citationWatters, T. R., C. J. Leuschen, B. A. Campbell, G. A. Morgan, A. Cicchetti, J. A. Grant, R. J. Phillips, and J. J. Plaut (2017), Radar sounder evidence of thick, porous sediments in Meridiani Planum and implications for ice-filled deposits on Mars, Geophys. Res. Lett., 44, 9208–9215, doi:10.1002/2017GL074431.en_US
dc.description.abstractMeridiani Planum is one of the most intensely studied regions on Mars, yet little is known about the physical properties of the deposits below those examined by the Opportunity rover. We report the detection of subsurface echoes within the Meridiani Planum deposits from data obtained by the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) instrument. The delay time between the surface and subsurface returns is indicative of materials with a real dielectric constant of 3.6 ± 0.6. The real dielectric constant is strongly modulated by bulk density. Newly derived compaction relationships for Mars indicate that the relatively low dielectric constant of the Meridiani Planum deposits is consistent with a thick layer of ice‐free, porous, basaltic sand. The unique physiographic and hydrologic setting of Meridiani Planum may have provided an ideal sediment trap for eolian sands. The relatively low gravity and the cold, dry climate that has dominated Mars for billions of years may have allowed thick eolian sand deposits to remain porous and only weakly indurated. Minimally compacted sedimentary deposits may offer a possible explanation for other nonpolar region units with low apparent bulk dielectric constants.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.rights©2017. American Geophysical Union. All Rights Reserved.en_US
dc.subjectMeridiani Planumen_US
dc.subjectElectrical propertiesen_US
dc.subjectWater iceen_US
dc.titleRadar sounder evidence of thick, porous sediments in Meridiani Planum and implications for ice‐filled deposits on Marsen_US
kusw.kuauthorLeuschen, Carl J.
kusw.kudepartmentCenter for Remote Sensing of Ice Sheetsen_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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©2017. American Geophysical Union. All Rights Reserved.
Except where otherwise noted, this item's license is described as: ©2017. American Geophysical Union. All Rights Reserved.