The rock forms slowly as the parts of the rock near the ground experience more erosion than the parts higher up. This is because the wind picks up grains of rock and sand, which can cause more erosion than simply rain and wind alone.
slowly
The base area of the rock was eroded more quickly than the upper sections, by water or wind. The wind near the base is able to pick up grains of sand and rock, and chip away the rock more quickly (this is the basis of the process known as sandblasting). Toward the top, there is less erosion.
Rapidly
Igneous Rock
In deserts, arches and mushroom rocks are formed when the sand in sand storms blows it and other materials against the rock which eventually erodes the rock into interesting shapes such as arches. ~Tom1819
Mushroom rocks like the one in Georgia are typically formed through a process called differential weathering, where softer rock erodes more quickly than harder rock, creating a "cap" on top of a narrower pedestal. This cap protects the pedestal underneath, giving it the mushroom-like shape. Over time, factors such as weathering, erosion, and geological processes contribute to the formation of these unique landforms.
crystal
a mushroom rock is not a sedimentary rock.
Intrusive igneous rocks are formed by slow cooling magma below the earth's surface. Extrusive igneous rock is formed by magma cooling quickly, at or near the surface.
Mushroom rocks are typically formed by erosion. Over time, softer rock material around a harder, more resistant rock can erode away faster, leaving behind the mushroom-like formation. Deposition can also play a role in shaping these structures as sediment accumulates around the base of the rock.
Intrusive igneous rock.
A mushroom is not an igneous rock, it is a fungi.