Related, there's a cool transition if you hike up the Greenwater river (starting at the town of Greenwater, heading towards FS70) there's a cool transition where the geology switches from Osceola mud to the more typical Cascade foothill geology (about half a mile from the White river).
I believe zoo is short for "zoological garden," but of course it's taken on additional meanings. Still, one occasionally hears the term "zoological and botanical garden."
