একটি আগ্নেয় nepheline এবং পাইরক্সিন গঠিত শিলা

nephelinite's Usage Examples:

700 sq mi) and consists of large expanses of alkali basalt, basanite and nephelinite that form extensive lava flows and volcanic cones.

distinguished from tephrite by its normative olivine content and from nephelinite by a normative albite content of over 5% and a normative nepheline content.

Olivine basalt is the principal volcanic rock but basanite and nephelinite are also found.

The extinct volcano is 16 million years old and is formed of nephelinite.

These include nephelinite, basanite and peralkaline phonolite, trachyte and comendite lavas.

The lava at Volcano Mountain is olivine nephelinite, which is an uncommon type of lava.

Their silica content can range from ultramafic (nephelinites, basanites and tephrites) to felsic (trachytes).

Olivine nephelinite has been collected near these basalts.

Franconian Jura (31 million years old, olivine-melilite-nephelinite and olivine-nephelinite) are no longer recognizable as such by their topography.

stages after a period of erosion, rocks of unusual composition such as nephelinite were produced in very small amounts.

series of basanite and hawaiite, which are intruded by many, younger nephelinite and basanite basalt dikes.

feldspathoid classifies a rock as silica-undersaturated; an example is nephelinite.

The nephelinic, leucitic and analcitic series evolves from nephelinite or melilite through analcite to leucitite or wyomingite.

"Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania".

They range from olivine-rich melilitites through leucites to nephelinites, containing, in various proportions mainly the minerals nepheline, leucite.

euro for scale) Rounded, yellow, weathered peridotite xenolith in a nephelinite lava flow at Kaiserstuhl, SW Germany Large xenolith of Baltimore Gneiss.

middle of the 19th century Geological natural reserve in the abandoned nephelinite and limestone quarry Museum of the Silesian Uprisings Silesian Uprisings.

nephelinite's Meaning':

an igneous rock consisting of nepheline and pyroxene

Synonyms:

nephelite; pyroxene; mineral; nepheline;

Antonyms:

organic;