Nephelinite

Nephelinite

Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite). If olivine is present, the rock may be classified as an olivine nephelinite. Nephelinite is dark in color and may resemble basalt in hand specimen. However, basalt consists mostly of clinopyroxene (augite) and calcic plagioclase. Silica-undersaturated, mafic igneous rocks are much less abundant than silica-saturated and oversaturated basalts. Genesis of the less common mafic rocks such as nephelinite is usually ascribed to more than one of the following three causes:
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Nephelinite
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Nephelinite

Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite). If olivine is present, the rock may be classified as an olivine nephelinite. Nephelinite is dark in color and may resemble basalt in hand specimen. However, basalt consists mostly of clinopyroxene (augite) and calcic plagioclase. Silica-undersaturated, mafic igneous rocks are much less abundant than silica-saturated and oversaturated basalts. Genesis of the less common mafic rocks such as nephelinite is usually ascribed to more than one of the following three causes:
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Als Nephelinit wird ein vulkan ...... her Zusammensetzung angesehen.
@de
La nefelinite è una roccia mag ...... prevalentemente grigio scuro.
@it
La néphélinite est une roche i ...... e) et de plagioclase calcique.
@fr
Nefeliniet is een fijn-kristal ...... maar plagioklaas en amfibool.
@nl
Nefelinit je tmavá jemnozrnná ...... elezný v Jičínské pahorkatině.
@cs
Nefelinit – należąca do foidyt ...... pejskiej prowincji bazaltowej.
@pl
Nefelinito é um tipo de rocha ...... inopiroxena (em geral augite).
@pt
Nephelinite is a fine-grained ...... the area around Uvalde, Texas.
@en
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Als Nephelinit wird ein vulkan ...... n (bzw. an der Gesamtheit der
@de
La nefelinite è una roccia mag ...... prevalentemente grigio scuro.
@it
La néphélinite est une roche i ...... e) et de plagioclase calcique.
@fr
Nefeliniet is een fijn-kristal ...... maar plagioklaas en amfibool.
@nl
Nefelinit je tmavá jemnozrnná ...... akčního tání v zemském plášti.
@cs
Nefelinit – należąca do foidyt ...... elilit (nefelinit melilitowy).
@pl
Nefelinito é um tipo de rocha ...... inopiroxena (em geral augite).
@pt
Nephelinite is a fine-grained ...... of the following three causes:
@en
label
Nefeliniet
@nl
Nefelinit
@cs
Nefelinit
@pl
Nefelinite
@it
Nefelinito
@pt
Nephelinit
@de
Nephelinite
@en
Néphélinite
@fr
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