The sand always gets through. There are also eroded layers here in Orson Welles Crater.
Beautiful Mars series. [More at links]
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mission instruments
- CRISM: Compact Reconnaissance Imaging Spectrometer for Mars
- CTX: Context Camera
- HiRISE: High Resolution Imaging Science Experiment
- MARSIS: Mars Advanced Radar for Subsurface and Ionosphere Sounding
- SHARAD: Shallow Radar
- THEMIS: Thermal Emission Imaging System
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- Tianwen-1 orbiter/rover
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