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Fly geyser
Fly geyser
The Fly Geyser is the result of man-made drilling in 1916, when water well drilling accidentally penetrated a geothermal source. 2009 photo.
The Fly Geyser is the result of man-made drilling in 1916, when water well drilling accidentally penetrated a geothermal source. 2009 photo.
Travertine terraces at Mammoth Hot Springs, Yellowstone National Park, in 2016
Travertine terraces at Mammoth Hot Springs, Yellowstone National Park, in 2016
Calcium-carbonate-encrusted, growing moss in a low-temperature freshwater travertine formation (1 euro coin for scale)
Calcium-carbonate-encrusted, growing moss in a low-temperature freshwater travertine formation (1 euro coin for scale)
Tourists climb Dunns River Falls with the help of guides.
Tourists climb Dunns River Falls with the help of guides.
Badab-e Surt's stepped travertine terrace formations. This travertine owes its red colour terraces to iron carbonate.
Badab-e Surt's stepped travertine terrace formations. This travertine owes its red colour terraces to iron carbonate.