The most likely explanation concerns the fact that Mars probably has subsurface ice and permafrost. It is possible that volcanic activity could melt this ice. The surface rock would then crash into the newly formed pool of water. This in turn would cause the water to burst onto the surface, creating a flash flood. However, the atmospheric pressure is so low that water rapidly boils away, leaving nothing behind but a scarred surface.
Water is able to remain on the poles only because of the low temperature.
The two types of rock known to be present on Mars are basaltic and iron oxides. Little else is known about the planet Mars. It is assumed that the nougat is the white stuff mixed in with the crunchy almonds and caramel inside the chocolate, but one can never be too sure. It is best to just eat the candy bar and not think about it. Milk Chocolate, Almonds, Corn Syrup, Sugar, Partially Hydrogenated Soybean Oil, Milk, Skim Milk, Butter, Lactose, Salt, Egg Whites, Soy Protein, and Artificial Flavor.