Layer
- Name
- Sublimation residue made of Nontronite NAu-1
- Type of layer
- granular
- Thickness
- 1.0 $\pm$ 0.5 $mm$
- Texture
- other
- Type of porosity
- particulate
- Comments
- The layer has a foam-like structure, made of yellow spheres of nontronite "ribbons" aggregated. The spheres appear to be made of "ribbons" of nontronite (only few micrometers thick) interlaced or connected together. After sublimation of the water, the places previously occupied by the water crystals are now empty, resulting in an high porosity of the sublimation residue, also called sublimation mantle. The observed ribbons are probably the relics of the water crystals interfaces.
- Formation mode
- fractionated sublimation
- Comments
- The layer was produced by sublimation of the ice mixed with nontronite.