Here's how it works:
* Differential weathering: Rocks are made of different minerals, and some are more resistant to weathering than others.
* Chemical weathering: Chemicals like water and oxygen react with the minerals in the rock, breaking them down.
* Exfoliation: The outer layers of the rock weather more quickly, causing the rock to break into layers.
As spheroidal weathering progresses, the outer layers of the rock erode faster than the inner layers. This leaves behind a rounded, spherical shape. This is particularly common in rocks like granite, which have a blocky structure and contain minerals that weather at different rates.
