Mineralogy
61Komatiite — Komatiites are ultramafic mantle derived volcanic rocks. They have low SiO2, low K2O, low Al2O3, and high to extremely high MgO. They were named for their type locality along the Komati River in South Africa. True komatiites are very rare and… …
62sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …
63Coloradoite — from the La Plata District of Colorado General Category Telluride mineral …
64Mineral — For other uses, see Mineral (disambiguation). An assortment of minerals. A mineral is a naturally occurring …
65Friedrich Accum — Infobox Scientist name = Friedrich Accum image size = 250px caption = From the European Magazine (1820) engraving by James Thomson. birth date = birth date|mf=yes|1769|03|29 birth place = Bückeburg, Schaumburg Lippe death date = death date and… …
66Robert Jameson — Professor Robert Jameson (1774 1854) was a Scottish naturalist and mineralogist, born in Leith, near Edinburgh, in July 1774. As Regius Professor at the University of Edinburgh for fifty years, Jameson is notable for his advanced scholarship in… …
67Lamprophyre — Lamprophyres (Greek λαµπρός (lamprós) = bright and φύρω (phýro) = to mix) are uncommon, small volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions. They are alkaline silica… …
68Karl Ludwig Giesecke — Portrait of Karl Ludwig Giesecke by Sir Henry Raeburn, ca. 1813 Karl Ludwig Giesecke (6 April 1761 in Augsburg – 5 March 1833 in Dublin) was a German actor, librettist, polar explorer and mineralogist. In his youth he was called Johann Georg… …
69Igneous rock — Geologic provinces of the world (USGS)   Shield …
70Abū Rayhān Bīrūnī — Infobox Muslim scholars | era = Matthew Deal image caption = Biruni on a 1973 Iranian post stamp commemorating his one thousandth anniversary | name = Abū Rayhān Muhammad ibn Ahmad Bīrunī title= Abu Rayhan Biruni birth = 15 September 973 AD|… …
