When the obliquity is higher, the poles receive more sunlight, causing those materials to migrate away. When carbon dioxide moves from the Martian poles, the atmospheric pressure increases, possibly causing a difference in the ability of winds to transport and deposit sand. Also, with more water in the atmosphere sand grains may stick and cement together to form layers.
As obliquity increases, poles receive more sunlight, leading to material migration. Carbon dioxide movement from Martian poles can increase atmospheric pressure, potentially affecting wind transport and sand deposition. Additionally, increased water in the atmosphere may cause sand grains to stick together, forming layers.