Comparison of the mineral composition of the sediment found in two Mars dunefields: Ogygis Undae and Gale crater - three distinct endmembers identified
Two dune fields on Mars are analyzed using thermal spectra, one used as a baseline. The composition of the Gale crater dune field is consistent with previous studies. The sediment composition observed at Ogygis Undae may be bimodal. A possible explanation for the bimodal distribution is sorting due to grain size.