"Rock formations" refers to the different shapes and structures that rocks take on in nature, often created through processes such as erosion and weathering. Full definition
The method has been proven robust for dating corals and larger rock formations in caves and has recently been adapted to date thin deposits of carbonate on rock art. (sciencemag.org)
See this natural rock formation formed through erosion, at its best during rough seas when the waves crash in and around the arch. (visitmelbourne.com)
Unique rock formations formed in the shape of arches allow divers to pass through them at this breathtaking site. (drakebay.com)