Plagioclase feldspar is formed from cooling magma or lava, which suggests the material in Valles Marineris originated from volcanic activity. Valles Marineris is a massive network of channels or ...

Figure 3: Section through La Paloma and Los Sulfatos ... Coupled CaAl–NaSi diffusion in plagioclase feldspar: experiments and applications to cooling rate speedometry. Geochim.