Search results
Results from the WOW.Com Content Network
Sican tumi, or ceremonial knife, Peru, 850–1500 CE. Metallurgy in pre-Columbian America is the extraction, purification and alloying of metals and metal crafting by Indigenous peoples of the Americas prior to European contact in the late 15th century. Indigenous Americans had been using native metals from ancient times, with recent finds of ...
Timeline of the discovery and classification of minerals. Georgius Agricola is considered the 'father of mineralogy '. Nicolas Steno founded the stratigraphy (the study of rock layers (strata) and layering (stratification)), the geology characterizes the rocks in each layer and the mineralogy characterizes the minerals in each rock.
Natural resources of France: Al – Aluminium, Fe – Iron, W – Tungsten, Au – Gold, U – Uranium, C – Coal, L – Lignite, P – Petroleum, G – Natural gas, F – Fluorine, K – Potash, T – Talc. Mining in France is based solely on the nature of the material, whether extracted from the surface or underground. These include fuels ...
History of mineralogy. Early writing on mineralogy, especially on gemstones, comes from ancient Babylonia, the ancient Greco-Roman world, ancient and medieval China, and Sanskrit texts from ancient India. [1] Books on the subject included the Naturalis Historia of Pliny the Elder which not only described many different minerals but also ...
Bauxite (/ ˈbɔːksaɪt /) is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium. Bauxite consists mostly of the aluminium minerals gibbsite (Al (OH)3), boehmite (γ-AlO (OH)) and diaspore (α-AlO (OH)), mixed with the two iron oxides goethite (FeO (OH)) and haematite (Fe2O3 ...
Mineral evolution. Most minerals on Earth formed after photosynthesis by cyanobacteria (pictured) began adding oxygen to the atmosphere. Mineral evolution is a recent hypothesis that provides historical context to mineralogy. It postulates that mineralogy on planets and moons becomes increasingly complex as a result of changes in the physical ...
The Gallery of Mineralogy and Geology (in French, galerie de Minéralogie et de Géologie) is a part of the French National Museum of Natural History ( Muséum national d'histoire naturelle, MNHN). It is situated in the Jardin des plantes ('Garden of the Plants') in Paris near the gare d'Austerlitz train station.
Taconite. Taconite (/ ˈtækənaɪt /) is a variety of banded iron formation, an iron -bearing (over 15% iron) sedimentary rock, in which the iron minerals are interlayered with quartz, chert, or carbonate. The name taconyte was coined by Horace Vaughn Winchell (1865–1923) – son of Newton Horace Winchell, the Minnesota state geologist ...