gneiss
noun
a metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica.
gneissic
-
a word derived from
gneiss.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Thin accumulations of light-colored rock layers can occur in a darker rock that is parallel to each other or even cut across the gneissic foliation.
From Textbooks ● Jan. 1, 2017
On the map the Superior Province, rocks are mostly pink, representing granitic and gneissic rocks, with strips and blotches of green, representing metamorphosed sea-floor basalt and sediments, also known as greenstone belts.
From Textbooks ● Jan. 1, 2015
It is to this lowermost gneissic group that the term “Archean” may be conveniently limited.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" by Various
A fine-grained rock of gneissic structure having a faint pink color.
From The Long Labrador Trail by Dillon Wallace
In some cases the pressure and heat have been so great that the rock assumes a distinctly gneissic character.
From To The Gold Coast for Gold, Vol. II A Personal Narrative by Sir Richard Francis Burton
