Examples from the Web for pitchstone
I had never seen him look as he did now, not even in Pitchstone Canyon when we came upon the bodies of Hank and his wife.The Virginian|Owen Wister
The lavas are curious from abounding in, or rather being in parts composed of pitchstone.More Letters of Charles Darwin|Charles Darwin
I was glad enough, though, when we struck the parklike levels of the Pitchstone plateau as the scene of our further progression.Pony Tracks|Frederic Remington
Such media are the volcanic rocks when they are rapidly cooled, producing various kinds of pitchstone, obsidian, &c.
The walls, or banks, of the channel have been denuded away, thus converting the pitchstone casting into a projecting wall of rock.Volcanoes: Past and Present|Edward Hull