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
Brandon (given name) Brandon (given name) Brandon is a masculine given name which originates from two or possibly three separate sources, two Celtic, the other, Anglo-Saxon, and has historically been used by these different cultures independently. Today, most people with the name do not have any connection or lineage with any of these sources and use them as if they were the same name. In the instances of the Celtic origins, it is either a variant of the Irish masculine given name, Breandán, or descended from the Old Welsh name Brân, meaning "crow". The Anglo-Saxon origin is the surname "Brandon". The given name