1850 — Edgar Allan Poe, "The Poetic Principle", The Works of the Late Edgar Allan Poe, Volume III:
He must be blind indeed who does not perceive the radical and chasmal difference between the truthful and the poetical modes of inculcation.
1910 — William Dean Howells, My Mark Twain: Reminiscences and Criticisms, Harper & Brothers Publishers (1910), page 98:
Once we took a walk together across the yellow pastures to a chasmal creek on his grounds, where the ice still knit the clayey banks together like crystal mosses; […]
1977 — Vincent Harding, "Clout for What?", Black Enterprise, March 1977:
So, in 1977, it is not sufficient to ask if we have clout, not even enough to demonstrate the portentious[sic] power we have created and used to force chasmal openings in American society.
2010 — John Heilemann & Mark Halperin, Game Change: Obama and the Clintons, McCain and Palin, and the Race of a Lifetime, Harper Perennial (2010), →ISBN, page 34:
She remained, as ever, a polarizing creature, one who would widen the chasmal partisan divide that opened up during her husband's two White House terms and only deepened in those of his successor.
