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Machine Design
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The application of scientific principles to the practical constructive art of engineering, with the object of expressing original ideas in the form of drawings.
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Ore Geology
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The branch of applied geology dealing with the genetic study of ore deposits. Syn: metallogeny; mining geology. See also: economic geology
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Fragmentation
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The breakage of rock during blasting in which explosive energy fractures the solid mass into pieces; the distribution of rock particle sizes after blasting.
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Dyke
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The British spelling of dike.
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Lithology
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The character of a rock described in terms of its structure, color, mineral composition, grain size, and arrangement of its component parts; all those visible features that in the aggregate impart individuality to the rock. Lithology is the basis of correlation in coal mines and commonly is reliable over a distance of a few miles.
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Luster
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The character of the light reflected by minerals; it constitutes one of the means for distinguishing them. There are several kinds of luster: metallic, the luster of metals; adamantine, the luster of diamonds; vitreous, the luster of broken glass; resinous, the luster of yellow resin, as that of eleolite; pearlylike pearl; and silkylike silk. These lusters have different degrees of intensity, being either splendent, shining, glistening, or glimmering. When there is a total absence of luster, the mineral is characterized as being dull
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Quad
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The composition quadrilateral for the Ca-Mg-Fe pyroxenes (enstatite-ferrosilite-diopside-hedenbergite).
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Wave Diffraction
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The cooperative scattering of any electromagnetic radiation where it
encounters an obstacle, esp. the edge of an obstacle, resulting in
constructive and destructive interference. Also, a single event resulting
from constructive interference.
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Diffraction
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The cooperative scattering of any electromagnetic radiation where it encounters an obstacle, esp. the edge of an obstacle, resulting in constructive and destructive interference. Also, a single event resulting from constructive interference. See also: optical diffraction; X-ray diffraction. Syn: wave diffraction
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Uralitization
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The development of amphibole from pyroxene; specif. a late-magmatic or metamorphic process of replacement whereby uralitic amphibole results from alteration of primary pyroxene. Also, the alteration of an igneous rock in which pyroxene is changed to amphibole; e.g., the alteration of gabbro to greenstone by pressure metamorphism.
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