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Exogenetic

A geologic process influenced at, or outside the earth’s surface

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Excitation

The process of bombarding matter with energy, creating an excited state of the said matter to facilitate the measurement of reflection and/or absorption of the said energy, thereby determining its mineral constituents from correlative readings. This process is used in X-Ray Fluorescent (XRF) mineral determination

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Excavation

The process of removing materials such as rock, gravel, soil and overburden for the purpose of locating or transporting target minerals or further facilitate the location and transportation of minerals

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Euxenite

A mineral ore found in pegmatites, mined for rare earth or radioactive minerals, including uranium, niobium and tantalum

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Eutrophic

A water body characterized by an abundant proportion of plant nutrients

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Euhedral

A crystallized mineral not influenced by the surrounding formative minerals

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Extrusion

A geologic process for rock formation by the emission of lavas, viscious or solid, usually pushed out towards the Earth’s surface or, thrusted in any direction within a contained igneous body

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Extraction

The removal of minerals through mechanical or chemical means

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Exploration

Physical or technical work carried out for the purpose of locating mineral targets