What is the process of tree roots growing inside rock crevices?

Tree roots can grow inside rock crevices through a process known as root penetration or root wedging. As roots encounter small openings, they can exploit these spaces, gradually expanding as they search for water and nutrients. The roots secrete acids that help break down minerals in the rock, further aiding their growth and creating more room. Over time, this process can lead to the physical weathering of the rock, contributing to soil formation.