Crust (geology) depth, reaching values typically in the range from about to at the boundary with the underlying mantle. The temperature increases by as much as for every kilometer locally in the upper part of the crust, but the geothermal gradient is smaller in deeper crust. The continental crust has an average composition similar to that of andesite. The most abundant minerals in Earth's continental crust are feldspars, which make up about 41% of the crust by weight, followed by quartz at 12%, and pyroxenes at 11%. Continental crust is enriched in incompatible elements compared to the basaltic ocean crust and much
Museum of Minerals in Siófok Museum of Minerals in Siófok Mineral Museum (Hungarian: Ásványmúzeum) is a museum in Siófok, Hungary. It was opened in 1986 in the centre of the city. It is a private museum, but the State also takes care of the collection. It includes more than 3000 pieces. It includes examples most notably from the Carpathian basin, and most of them are minerals and fossils. There are a lot of very rare minerals from the mining areas of Transylvania. There are some objects from distant regions of the world as well. The Kövecses Family has been collecting minerals for 4 generations. The