नेफेलिन इसके अंग्रेजी अर्थ का उदाहरण

Code search engines Borolanite is an historical petrological name for a pyroxene-melanite bearing nepheline syenite variety which contains nepheline-alkali feldspar pseudomorphs interpreted to be after leucite which occur as conspicuous white spots in the dark rock matrix.

It was first described in 1957 for an occurrence in nephelinite lavas and tephra on Mt.

These last consist of an intermixture of nepheline or sodalite and alkali-feldspar.

This nondescript hill in the Beemerville section of Wantage Township, is the surface expression of a lamprophyric diatreme that is the northern part of the Late Ordovician Beemerville Alkaline Complex that also includes two large nepheline syenite plutons; and several other nearby and much smaller dikes, sills, and diatremes.

The largest inbound commodities were nepheline syenite, clay, steel, fertilizer, coke and sand.

Shaheru, Congo; and with wollastonite, clinopyroxene, nepheline, melilite, titanian garnet and titanian magnetite at Oldoinyo Lengai.

At the margins of the outcrop patches of nepheline syenite occur; usually the nepheline is decomposed, but occasionally it is well preserved; the other ingredients of the rock are brown garnet (melanite) and aegirine.

Connected with the borolanite there are other types of nepheline syenite and pegmatite.

Closely allied to parisite, and indeed first described as such, is a mineral from the nepheline-syenite district of Julianehaab in south Greenland.

In places the nepheline syenite assumes the form of a dark rock with large rounded white spots.

In Finland, melanite bearing nepheline rocks have been found and described as ijolite, but the only other locality for melanite-leucite-syenite is Magnet Cove igneous complex in Arkansas.

It was first reported in 1955 from a nepheline syenite pegmatite in the Kola Peninsula.