Crust (geology) crustal rocks formed before 2.5 billion years ago are located in cratons. Such old continental crust and the underlying mantle asthenosphere are less dense than elsewhere in Earth and so are not readily destroyed by subduction. Formation of new continental crust is linked to periods of intense orogeny; these periods coincide with the formation of the supercontinents such as Rodinia, Pangaea and Gondwana. The crust forms in part by aggregation of island arcs including granite and metamorphic fold belts, and it is preserved in part by depletion of the underlying mantle to form buoyant lithospheric mantle. A theoretical protoplanet named
Cameron (given name) Cameron (given name) Cameron is a given name in the English language. It is a very popular male name in North America, Europe, and Australia. Cameron is ranked as a top 50 name for boys in Scotland, Canada, England, and the United States. The name originates from the Scottish surname "Cameron". In the Scottish Highlands the surname is thought to be derived from the Gaelic "cam sròn", meaning "crooked nose" or "crooked river"; in the Scottish Lowlands the name is thought to be derived from a form of Norman baronial name—from Cambernon, in Normandy. A variant spelling of the given