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List Of Fossiliferous Stratigraphic Units In Mauritania
This is a list of fossiliferous stratigraphic units in Mauritania. __NOTOC__ See also * Lists of fossiliferous stratigraphic units in Africa ** List of fossiliferous stratigraphic units in Mali ** List of fossiliferous stratigraphic units in Senegal ** List of fossiliferous stratigraphic units in Western Sahara * Geology of Mauritania References Further reading * P. R. Racheboeuf, R. Gourvennec, M. Deynoux and D. Brice. 2004. The Devonian of the Hodh area (Islamic Republic of Mauritania): paleontology and stratigraphy. Journal of Paleontology 78(1):98-110 {{DEFAULTSORT:Fossiliferous stratigraphic units in Mauritania Fossiliferous stratigraphic units of Africa, Mauritania Paleontology in Mauritania Geologic formations of Africa by country, Mauritania Mauritania geography-related lists, Fossiliferous stratigraphic units Africa geology-related lists, Fossil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Pog
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental (native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
