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Morning Glory pool at Yellowstone National Park, Wyoming, USA.

Detail of one of the hot springs that are located at Yellowstone National Park.

Vivid colors of the Black Pool in the Yellowstone National Park, Wyoming

Geysers and Hot Springs at Yellowstone May 2021

Yellowstone National Park sits on top of a dormant volcano and is home to more geysers and hot springs than any other place on earth. Wonders abound at this truly unique national park, from sites like the Yellowstone Grand Canyon to wildlife like America's largest buffalo herd, grizzly bears, and wolves.

$Old Faithful Geyser Eruption\nYellowstone National Park$

Old Faithful Geyser in Yellowstone National Park

land with sulphur at Yellowstone National Park

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.

Morning Glory Pool - Yellowstone - August 1993. Scanned from Kodachrome slide.

Norris Geyser Basin, Yellowstone National Park.

Thermal spring, one of many nature wonders in the Yellowstone National Park, Wyoming, USA. Feature created over thousands of years as hot water from the spring cooled and deposited colorful calcium carbonate.

River with valley, forests and mountains in the Colorful Norris Geyser Basin in Yellowstone National Park with beautiful landscape. the smell, the colors, the sounds are a natural experience. USA

Geothermal pool in Wyoming, USA

A colourful and high contrast shot of a geothermal pool in Taupo in the north island of New Zealand.

Close-up of iron sulfate formations creating a mosaic of reds and oranges in the Rio Tinto's waters

The gold-colored runoff at the Upper Geyser Basin in Yellowstone National Park is typically caused by thermophiles, heat-loving microorganisms that thrive in the hot, mineral-rich waters of the geothermal features. These microorganisms, particularly certain types of bacteria and archaea, produce pigments that give the runoff its striking colors. The gold or yellow color is often attributed to thermophilic bacteria like Thermocrinis or other species that can process sulfur or iron, creating vibrant hues in the runoff channels. These colorful runoffs are a hallmark of the park's geothermal activity.

Geyser in Yellowstone National Park

close up of hot blasting water from active gushing gayser in yellowstone national park in america, usa

The Yellowstone National Park, USA - hot lakes and springs of amazing colors

Old Faithful, Upper Geyser Basin, Yellowstone National Park, USA

$Upper Geyser Basin in Winter\nYellowstone National Park$

Geothermal pool in winter Yellowstone National Park steaming

Special landscapes made with film camera in USA

South Scalloped Spring is known for its beautifully scalloped edges and clear, blue water. This hot spring's distinctive scalloped formations are created by mineral deposits, which build up around the edge of the spring over time.

Yellowstone National Park - Old Faithful Starting to Erupt - 1981. Scanned from Kodachrome slide.

Vibrant geyser

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