Noun:

ধূসরবর্ণ স্ফটিকাশিলাবিশেষ,

syenite's Usage Examples:

Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar.

For example, a syenite with significant nepheline present can be termed a '(nepheline)-bearing syenite', or a '(nepheline)-syenite', with the term (nepheline).

alkali feldspar – a plutonic rock with <5% normative quartz Nepheline syenite – A silica-undersaturated plutonic rock of nepheline and alkali feldspar.

nepheline syenites.

Eudialyte was first described in 1819 for an occurrence in nepheline syenite of the.

Its intrusive equivalent is nepheline syenite.

an occurrence on Iwagi Islet, Japan, where it is found in an aegirine syenite intrusive stock.

There is a significant syenite reserve near the village.

13 Ma) quartz syenite.

Guanambi-Urandi Batholith formed with monzonite, granite intrusions and syenite, which was subsequently covered by Neoproterozoic sedimentary rocks.

Rock richer in alkali feldspar is classified as syenite, while rock richer in plagioclase is termed a monzodiorite.

2 Ga), and the granite–monzogranite–syenite granite (GMS) suite (emplaced approximately 3.

A rock with more alkali feldspar is a syenite whereas one with more plagioclase is a quartz diorite.

coarse-grained, foliated variety of nepheline syenite, sometimes called nepheline syenite gneiss or gneissic nepeheline syenite.

Geologically located on the Canadian Shield it is mostly composed of peralkaline syenite (granitic rock with low quartz content).

The mineral occurs in nepheline syenite pegmatites and granite and aplite greisens.

It is found where a syenite of the Murunskii Massif has intruded into and altered limestone deposits.