Mark Twain. (2023, November 25). Wikiquote. Retrieved January 7, 2024 from https://en.wikiquote.org/w/index.php?title=Mark_Twain&oldid=3407072.
Evbxp: Volcanic breccia—Dacitic to andesitic lithic tuff breccia with lesser (crystal) lithic lapilli tuff and minor agglomerate; typically dark green-gray to light gray, with multicolored red, green, and gray to black volcanic clasts; weathers gray-brown; moderately to poorly sorted; very thick to massive.