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Stunning rock formations in Capital Reef National Park, Utah, USA. Lots of unique shapes made out of red, orange and grey stones.
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
Hot springs are the most common hydro-thermal features at Yellowstone National Park.  They vary from frothing mocha-like boiling water to clear and calm pools of tremendous depth.
Mount Wilson With Autumn Aspen Trees Near Telluride Colorado USA
Grand Prismatic Spring Overlook in Yellowstone National Park, Wyoming, USA.
colorful landscape of the midway geyser basin area of yellowstone national park.
Yellowstone National Park
Norris Geyser Basin at Yellowstone National Park
Grand Prismatic Spring in Yellowstone National Park, USA
Thermophilic Microbial Mat at Sapphire Pool in Biscuit Basin of Yellowstone National Park, Wyoming
Closeup of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA
sinter terraces at Mammoth Hot Springs in the North of Yellowstone National Park
Lion Geyser Group view of Old Faithful Geyser Erupt in Yellowstone National Park, Wyoming, USA.
Black Opal Pool next to Black Diamond Pool in Yellowstone's Biscuit Basin, Yellowstone National Park, Wyoming, USA
Yellowstone River cuts a deep canyon as it moves north in the Yellowstone Ecosystem in western USA and North America.  Nearest cities are Gardiner, Cooke City, Bozeman, Billings, Montana, Jackson, Wyoming, Salt Lake City, Utah and Denver, Colorado.
Yellow terraces of travertine are part of the hot springs in Mammoth Hot Springs
Biscuit Basin is a geothermal area named for the biscuit-like silica formations that once surrounded its most famous feature, Sapphire Pool. After an eruption in 1959, many of the biscuit formations at Sapphire Pool were destroyed. It's a relatively small geothermal area compared to others in the park. The entire basin can be explored via a boardwalk loop that is approximately 0.7 miles (1.1km) long.
Emerald Pool at Black Sand Basin  in Yellowstone National Park_2550
The colourful rocks of Painted Desert National Park, Arizona
Wind River Lake which is a high mountain lake on Togwotee Pass with Breccia Cliffs and Breccia and Sublette Peaks in the Absaroka Mountains in the summer in Wyoming USA.  This is the mountain pass between Dubois Wyoming and the Grand Tetons National Park / Jackson Hole (valley) where the Absaroka and Wind River mountain ranges of the Rockies meet.
Culvert Geyser view of Old Faithful Geyser Erupt in Yellowstone National Park, Wyoming, USA.
Geothermal Hot Springs at Mammoth Hot Springs, Yellowstone National Park, USA
Summer scenery at Theodore Roosevelt National Park, North Dakota, USA
Geyser and hot spring in old faithful basin in Yellowstone National Park in Wyoming
Porcelain Basin spans about one square mile and is renowned for its otherworldly, stark white landscape created by siliceous sinter deposits. It is one of the most active geothermal areas in the park, featuring numerous geysers, hot springs, and fumaroles, with temperatures often exceeding 200°F (93°C). Its colours are caused by  thermophilic (heat-loving) microorganisms including various types of bacteria and algae. Cyanobacteria, for instance, contribute blues and greens, while different species of archaea and bacteria create reds, yellows, and oranges. The colors are also influenced by the mineral content of the water, such as iron, sulfur, and silica, which can form colorful mineral deposits and runoff channels.
volcanic activity with steam, thermal pools and prismatic springs
Majestic rural landscape
Wonderful Blue Lake and Yellowstone, Wyoming, USA,Nikon D3x
Colorful geyser basins in Yosemite National park
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