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Transverse Aeolian Ridges on Mars: Distribution, orientations, and ages

Introduction: Mars is host to a wide range of aeolian forms such as dunes, ripples, dust devils, dust storms, yardangs, and ventifacts. Large dune fields characterized by low albedos and large duneform sizes have been observed and occur mainly around the north polar cap and in the southern mid-latitudes. However, another morphologically and dimensionally distinct population of aeolian bedforms has also been noted. These are generally brighter than the surrounding terrain, are about an order of magnitude smaller than the large, dark dunes (LDDs) and have simple forms. These bedforms have been designated ‘Transverse Aeolian Ridges’, or ‘TARs’ [1].