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Johannsenite is a silicate mineral that is a member of the pyroxene family. The mineral can be produced in limestone or due a metamorphic process. [3] The mineral is also associated with Pb-Zn mineralization.
The Johnson–Forest Tendency, whose supporters are called the Johnsonites, was a radical left tendency in the United States associated with Marxist humanist theorists C. L. R. James and Raya Dunayevskaya, who used the pseudonyms J. R. Johnson and Freddie Forest respectively.
Werner's yellow. Werner's Nomenclature of Colours is a book of named colour samples compiled by Abraham Gottlob Werner, and subsequently amended by Patrick Syme. [1] The book, first published in 1814, was used by Charles Darwin in his scientific observations.
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Federal Standard 595 is the color description and communication system developed in 1956 by the United States government. Its origins reach back to World War II when a problem of providing exact color specifications to military equipment subcontractors in different parts of the world became a matter of urgency.
The Magnet Cove igneous complex is a small alkalic ring complex lying to the west of the town of Magnet Cove in Hot Spring County, Arkansas. [1] It and the adjacent town are so named due to the existence of magnetite and the terrain being a cove, a basin-shaped valley. [2] The complex is of Mesozoic age, intruded into Paleozoic sediments. [1]
The NYC teachers’ union is coaching educators on how to help migrant kids and families avoid getting picked up by Immigration and Customs Enforcement at home or in public – going beyond the ...
The term Podzols is used in the World Reference Base for Soil Resources [15] (WRB) and in many national soil classification systems (in some of them, spelled Podsols). The USDA soil taxonomy [ 16 ] and the Chinese soil taxonomy [ 17 ] call these soils Spodosols .