How does moles created a perfect cylindrical sand ‘pipe’ ?

Question

When one looks at a mole hill a lot of the times (depending on the type of sand i would imagine) the sand that comes out is in a near perfect cylindrical shape. How is this possible when the mole pushes this sand from bottom to top (outside)? Everything starts underground as far as i know. How?

In: 0

Answer 1

They push the soil with their paws. It’s not perfect. Usually the ground is pushed up where they tunnel. Otherwise they push excess soil out the front.