adjective
- of, relating to, or containing nepheline (a silicate mineral); characteristic of igneous rocks rich in nepheline
Usage: geology; technical
Examples
- The nephelinitic lava flows in the volcanic region contain significant amounts of nepheline crystals.
- Geologists classified the rock sample as nephelinitic based on its mineral composition.
- Nephelinitic magmas are typically undersaturated in silica.
- The nephelinitic basalt displayed characteristic light-colored feldspathoid minerals.