The mushroom-shaped earth pillar is a natural sculpture formed through differential erosion. The top layer consists of harder rock or soil that is more resistant to erosion, acting as a "mushroom cap" to protect the softer soil layers beneath from direct rainfall. Over tens of thousands of years, the softer base is gradually eroded by wind and water, becoming narrower while the wider top remains, resulting in a pillar that resembles a mushroom standing on an earthen stem.