potassic
11TAS classification — The TAS classification can be used to assign names to many common types of volcanic rocks based upon the relationships between the combined alkali content and the silica content. These chemical parameters are useful, because the relative… …
12Kimberlite — is a type of potassic volcanic rock best known for sometimes containing diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an 83.5 carat diamond in 1871 spawned a diamond rush, eventually creating the Big… …
13List of minerals N-R (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …
14Ultrapotassic igneous rocks — are a class of rare, volumetrically minor generally ultramafic or mafic silica depleted igneous rocks. Ultrapotassic rocks are defined by molar K2O/Na2O >3 in much of the scientific literature. In other papers written as recently as 2005, they… …
15Richard L. Hay — Richard LeRoy Hay (April 29 1929 ndash; February 10 2006) was an American geologist whose most famous work was as the principal geologist working with Mary Leakey at Olduvai Gorge, the site of many important hominid finds in the study of human… …
16Actinote (minéral) — Pour les articles homonymes, voir Actinote. Actinote Catégorie IX : silicates[1] …
17Trémolite — Catégorie IX : silicates[1] Campolungo, Tessin Suisse (Topotype) …
18Nepheline syenite — of the Intrusive Complex of Tanguá, State of Rio de Janeiro, Brasil (Motoki et al., 2011a) Nephelene syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or… …
19Metasomatism — is the chemical alteration of a rock by hydrothermal and other fluids. Metasomatism can occur via the action of hydrothermal fluids from an igneous or metamorphic source. Metasomatic albite + hornblende + tourmaline alteration of metamorphosed… …
20Sariwon — Infobox Korean name context=north caption=A Sariwon riverfront hangul=사리원시 hanja=沙里院市 mr=Sariwŏn si rr=Sariwon siSariwŏn is the capital of North Hwanghae Province, North Korea. The city s population is reported to be 310,100 people and its… …
