Erosion had carved deep, vertical clefts so that the mound looked a little like a huge gear turned on edge.

Erosion carved this deep box canyon from the sandstone of the Shawnee Hills, and it opens into the floodplain of the Mississippi River near Turkey Bayou.

Erosion by rain and rivers has carved deep jungle canyons and valleys into the sandstone.

Erosion has shaped volcanic spires and carved an extensive network of canyons through which run rivers subject to highly irregular flows that are rapidly lost to the desert sands.

Erosion has carved bowl-shaped cavities in many of these wind- and rain-sculpted sandstone boulders and these cavities are often filled with water (or ice) and algae.

Erosion has carved several large rocks into striking and unusual shapes.

Erosion had carved it into a fantasy of towers and turrets; men had carved these further into a castle city that covered the mountaintop.

Erosion from the river had carved it ages ago, but now the riverbank came no nearer than a quarter-mile.

Erosion by wind, rain, storms and ice over millions of years carved out the plateaus of the Northern Tablelands, and rivers and streams gradually cut back the eastern edge of the tableland creating deep gorges that eventually formed one continuous escarpment.

Erosion had carved the tuff wherever bracks in the andesite exposed it, forming the tunnel-bottomed ravines, and also revealing great seams of caliche, trapped between the two layers.