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Dust devils in Amazonis Planitia Dust devils in Amazonis Planitia, Mars, observed with the Mars Reconnaissance Orbiter Context Camera. This image (CTX P02_001855_2155_XN_35N160W) was among a set of over 120 analyzed by Lori Fenton in a study published by us recently in Icarus. Note the regular spacing, which likely indicates the thickness of the atmospheric boundary layer. NASA / JPL-Caltech / MSSS / Fenton and Lorenz (2015)