Gravity, not glue, allows towering sandstone pillars and arches to withstand howling wind and pouring rain, researchers propose July 20 in Nature Geoscience. Sandstone forms when tiny sand grains bind ...

The fantastical arch shapes of sandstone formations have long been thought to be sculpted by wind and rain. But a team of researchers has now found that the shapes are inherent to the rock itself.

An accretion of iron molecules leaves a bizarre pattern in the sandstone. For larger image, click here. Photo by Jeff Mitton. The multitude of parks on the Colorado Plateau is testimony of our ...

The fantastical arch shapes of sandstone formations have long been thought to be sculpted by wind and rain. But a team of researchers has now found that the shapes are inherent to the rock itself.