augite
noun
a silicate mineral, chiefly of calcium, magnesium, iron, and aluminum: a dark-green to black variety of monoclinic pyroxene, characteristic of basic rocks.
augitic
-
a word derived from
augite.
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.
Limestones weather much more rapidly than clay-rocks; and augitic igneous rocks, as a rule, disintegrate more readily than the more highly silicated species.
From Geology by James Geikie
The bones were dug up by Mr. Walter Mantell from a bed of marly sand, containing magnetic iron, crystals of hornblende and augite, and the detritus of augitic rocks and earthy volcanic tuff.
From COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 by Alexander von Humboldt
Numerous dikes, consisting chiefly of highly compact augitic rocks, and of gray amygdaloidal varieties, intersect the strata, which have in several places been dislocated with considerable violence, and thrown into highly inclined positions.
From Volcanic Islands by Charles Darwin
When augitic and hornblendic materials predominate, then other terms are used; as, for example, dolerite tuff, greenstone tuff.
From Geology by James Geikie
Pumice and trachyte are the most common rocks around this mountain, and these are augitic or porphyroid.
From The Andes and the Amazon Across the Continent of South America by James Orton
