photographic tour of Oregon Caves. According to page 16 of this PDF tour, this spot is called "Niagara Falls." It was a mostly white surface of flowstone, next to the path, and early tourists were encouraged to autograph the spot, and often added dates and other notes. According to the description of the feature, "The Forest Service tried to erase the signatures in 1917 but enough calcite formed over them by then that they could not be erased." It's unsightly graffiti, but the dates allow precise measurements of the rate of deposition here... eyeballing it, it looks like less than a millimeter per century.
Photo unmodified. May 9, 2013. FlashEarth Location. (Since we're underground, I have only a vague idea where this is with respect to the surface.)
Is This Your Hat?
2 years ago