A TRAVERSE THROUGH HESPERIAN RIDGED PLAINS ON MARS: EXTENDING THE WORK OF RON GREELEY IN GUSEV CRATER
If the floor of Gusev crater investigated by Spirit represents Hesperian ridged plains, then information obtained along its traverse may serve as “ground truth” for other examples of this global unit. However, the rocks observed by Spirit comprise only a small fraction (<20%) of the surface, which is dominated by soil (the fine fraction of the regolith). And both of these surface units are variably covered by airfall dust. Nevertheless, the thermal infrared (TIR) spectral characteristics of all three units have been measured with the Miniature Thermal Emission Spectrometer (Mini-TES) and can be used for investigations beyond Gusev crater. We will present initial results comparing Mini-TES spectra to TIR spectra from the Mars Global Surveyor Thermal Emission Spectrometer for other Hesperian ridged plains in order to assess possible compositional similarities.
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