This first "EVA" was out of simulation and without spacesuits. Due to bad weather conditions, we couldn't stay out a long time. We did a brief reconnaisance of the area around the Hab. We found a "balanced rock" surrounded by a field of mud-cracks.

We saw a balanced rock: Erosion wears away the exposed part of the rock strata. The harder layers protect the softer ones beneath from the erosion.

Balanced Rock

Mud-Cracks

We also saw mud-cracks: The mud is exposed to the atmosphere, so the superficial water evaporates and the mud becomes dry. Later, the intersticial water also evaporates. The mud is then very fine grained, and very porous, when the water evaporates the volume shrinks and the contraction creates moulding fissures with a poligonal shape.