Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
One seam of coal of good quality has been worked three and a half feet thick, and there are several feet more of pyritous coal resting upon it.
From The Student's Elements of Geology by Sir Charles Lyell
Fossil wood with Teredo antenautæ is also met with, and pyritous casts of univalve and bivalve shells.
From Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology by Various
As to the size of a pyritous mass necessary to produce in this manner a large nugget, it is by no means considerable.
From Getting Gold: a practical treatise for prospectors, miners and students by J. C. F. (Joseph Colin Frances) Johnson
But this is the case; we find those fissures filled both with calcareous, gypseous, and pyritous substances.
From Theory of the Earth, Volume 1 (of 4) by James Hutton
After visiting the pyritous marls of the Rio Juagua, we continued following the course of the crevice, which stretches along like a narrow canal overshadowed by very lofty trees.
From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 by Thomasina Ross
