Downriver Walk 2015—More Leptothrix discophora
November 1, 2015
I saw more manifestations of Leptothrix discophora September 18 than I showed last week. Here are five more views of it. The sixth photograph shows the iron-oxide precipitate of another oxidizing iron bacterium or bacteria and a lighter precipitate of a different mineral, perhaps aluminite, which has made its appearance in the Vermilion River riverbed on other occasions. To quote from my book, “Aluminite hasn’t been studied in the Vermilion River, but elsewhere it is known to form around fungal and bacterial masses.”
The talk I gave about my book to the Friends of the Oberlin College Library October 27 was recorded, and the video is now online.