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.
In the southern mass near Pettigo, once regarded as Archaean and fundamental, residual “eyes” of the hornblendic rocks that are associated with the Dalradian series remain floating, as it were, in the gneiss.
From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" by Various
In this case and at Rat Island, the passage of the gneiss into imperfect hornblendic or into chloritic slate, seemed to be connected with the segregation of the veins of quartz.
From Geological Observations on South America by Charles Darwin
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
The oldest stratified rock of Scotland is the hornblendic gneiss of Lewis, in the Hebrides, and that of the north-west coast of Ross-shire, represented at the base of the section given at Figure 82.
From The Student's Elements of Geology by Sir Charles Lyell
Near Coquimbo there is much hornblendic rock and various dusky-coloured porphyries.
From Geological Observations on South America by Charles Darwin
