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
Ronja (given name) Ronja (given name) Ronja is a feminine given name in use largely in Scandinavian countries. It was created by the Swedish author Astrid Lindgren for her 1981 children's book "Ronja Rövardotter". "Ronja" is also a Russian pet form of Veronika, but very few people were given this name in Scandinavian countries prior to 1981. It was the third most popular name given to baby girls born in the Faroe Islands in 2008 and is also rising in popularity in other Scandinavian countries. The English translation of the name is Ronia. The first living person in Sweden to be baptised as