hornblende
noun
a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.
hornblendic
-
a word derived from
hornblende.
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.
Near Coquimbo there is much hornblendic rock and various dusky-coloured porphyries.
From Geological Observations on South America by Charles Darwin
Some of these hornblendic masses may really have been volcanic rocks, which have since assumed a more crystalline or metamorphic texture.
From The Student's Elements of Geology by Sir Charles Lyell
When augitic and hornblendic materials predominate, then other terms are used; as, for example, dolerite tuff, greenstone tuff.
From Geology by James Geikie
The large Brumer Island is composed of igneous rocks as formerly mentioned; and at Dufaure Island I obtained from some canoes which came off to us a few smooth water-worn pieces of hornblendic porphyry.
The valley of the Nile from Cairo to Assouan has yielded a series of objects in flint, porphyry, and hornblendic rock, retaining traces of human workmanship, and reminding us of similar implements of European type.
From Manners and Monuments of Prehistoric Peoples by N. D'Anvers
