Sedimentary rocks are the "recyclers" of the rock cycle, they take any other rock and turn it into a new one. Antelope Canyon in Arizona is carved from sandstone, a sedimentary rock.

The rocks on Earth are constantly changing due to many different processes. There are three main types of rock, with rocks changing between each type over millions of years.

Limestone, for example, is a sedimentary rock made exclusively of the mineral calcite (CaCO3). Glacier ice too, is a type of rock composed of crystals of water.

It is the first fully documented and dated example of what the team have termed a "rapid anthropoclastic rock cycle", which behaves like natural rock cycles but includes human material and happens ...