- a variety of schist containing needles of hornblende that lie in parallel planes.
Origin of hornblende schist
First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hornblende schist
This killas is converted into hornblende-schist near the contact with the veins.A Manual of Elementary Geology
Many outcrops of similar rocks have been traced in the northern zones of the Alps, often with serpentine and hornblende-schist.
The term is to some extent synonymous with “amphibolite” and “hornblende-schist.”