Today for #MinCup23 I'm voting ammineite because guano mineral 😆 I got no folklore for it, even though I vaguely remember reading a bat guano folktale at some point... couldn't locate it. Maybe for the next round.
In 1856 the U.S. passed the #GuanoAct, which allowed Americans to claim guano islands that the President could then recognize as "appertaining" to the U.S.
Under the Guano Act, the U.S. claimed the uninhabited (but regularly visited by Haitian fishermen) Caribbean island of Navassa, an acquisition some sarcastically referred to as "Seward's Outhouse".