The images used in this website are scanned from original stereographs that were purchased as souvenirs
by Emma Sanor (from Minerva, Ohio) while visiting Yellowstone in 1916.
The stereographs are therefore older than that date (and have hence expired
their copyright). Stereo photography became extremely popular starting
in the early 1880's. The oldest date for any of these original images
was about 1884. Individual pages can be clicked on below.
For more information about Yellowstone National Park's
geology visit the U.S. Geological Survey's Yellowstone Volcano Observatory website at http://volcanoes.usgs.gov/yvo/.
Also visit the official National Park Service's website
for Yellowstone National Park at http://www.nps.gov/yell/.
Click here to see more
geology tours of national parks.
The images used for this website were made from original stereographs (black and white stereo pairs)
that were scanned and manipulated into anaglyphs (3-D images)
with image processing software (Adobe PhotoShop). You will need red-and-cyan
stereo viewing glasses to get the 3-D visual effects.
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