http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Learn about the rock cycle, the process by which Earth's surface and crust constantly evolve
The rock cycle takes many millions of years to complete, but it is the key to geologic change on our planet. Geology, igneous rock, metamorphic rock, sedimentary rock.
[John P. Rafferty, narrator] ; [Melinda Leonard, director].
Title from resource description page (viewed October 14, 2021).