Objectives: We had two different objectives today because we had two different EVAs. One was to check if it was possible to draw and write comments about stratigraphic sections. This experience was carried out at the Mona Lisa Canyon, on a sequence of siltstone and sandstone. The second objective was to investigate the geology of Lith Canyon.

Summary of Findings: It was not a great day for the stratigraphy experiment because of the strong winds but we tried to do it anyway. The most difficult task was to handle the paper with such a wind. Apart from this, we found that it is more difficult to draw than to write but both are possible. It would have been easier with gloves that better fit the hand (like the MarsSkin gloves probably). Just remember to keep far enough from low hanging cliffs so as not to damage the helmet, even to see a recessed stratum!

Lith Canyon was a beautiful place with a lot of different kinds of geological aspects to study. We definitely have to go back to this place to have a closer look. First, we found a nice bivalve fossil (probably Unionide or Myidae) (see figure 3). It was partially buried on the top of Lith Canyon and there was only one in the area that we could locate.

Down in the canyon, we found prints in the rocks (see figure 4). These marks are between 10 and 15 cm in length. We will consult with the Remote Science Team for the interpretation. A little bit West in the canyon, we discovered rocks with white marks (see figure 5), we are wondering what they can be?

While going back East, we saw what looks like two small white concretions (see figure 6), but found no others in the area. In the canyon, we also found what we believe may be petrified wood (see figures 7 & 8).

What a full geology day!

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Figure 1 Tiziana writing comments about the strata	Figure 2 Nice mud-curls: The edges of mud-crack polygons are wraped & lifted from the substratum to roll themselves up
Figure 3 Bivalve fossil	Figure 4 10 to 15 cm in lenght prints
Figure 5 White marks in rocks	Figure 6 White small and isolated concretions
Figure 7 Maybe petrified wood	Figure 8 Maybe petrified wood