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nephelinite's Usage Examples:

rocks at the surface are leucite-tephrites, with subordinate phonolites, limburgites, and olivine-nephelinites (at the Limberg Mountain near Sasbach), the.

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

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

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

If olivine is present, the rock may be classified as an olivine nephelinite.

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

Basalt, alkali basalt, basanite, tephritic nephelinite, and nephelinite differ partly in the relative proportions.

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.

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

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

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

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

Synonyms:

nephelite, pyroxene, mineral, nepheline,

Antonyms:

organic,