Figure 11-30: R I V U X G
Martian Sand Dunes (a) Enhanced-coloring brings out the composition of these dunes. Blue indicates sand that came from volcanic rock. The lighter colors on top are probably very fine-grained dust. (b) Sand from clay minerals form dunes that partially cover sedimentary rock.
Martian Sand Dunes (a) Enhanced-coloring brings out the composition of these dunes. Blue indicates sand that came from volcanic rock. The lighter colors on top are probably very fine-grained dust. (b) Sand from clay minerals form dunes that partially cover sedimentary rock.
(NASA/JPL/University of Arizona)