Editing Dune (section)

==Lithified dunes==
[[File:Cross-bedding Of Sandstone Near Mt Carmel Road Zion Canyon Utah.jpg|thumb|Cross-bedding in lithified aeolian sand dunes preserved as sandstone in Zion National Park, Utah]]
A [[Lithification|lithified]] (consolidated) sand dune is a type of [[sandstone]] that is formed when a marine or aeolian sand dune becomes compacted and hardened. Once in this form, water passing through the rock can carry and deposit minerals, which can alter the colour of the rock. [[Cross-bedding|Cross-bedded]] layers of stacks of lithified dunes can produce the cross-hatching patterns, such as those seen in [[Zion National Park]] in the western United States.

A slang term, used in the [[Southwestern United States|southwest US]], for consolidated and hardened sand dunes is "slickrock", a name that was introduced by pioneers of the [[Old West]] because their steel-rimmed wagon wheels could not gain traction on the rock.{{citation needed|date=September 2021}}