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The numerous boiling mud springs characterize some areas of Yellowstone Park and testify to the volcanic character of the area.
Porkchop Geyser's name derives from its pork chop-shaped sinter mound. Measuring around 2 feet in diameter, the geyser was once a tranquil hot spring until 1971 when it began erupting intermittently. In 1989, it experienced a violent hydrothermal explosion, scattering debris over 200 feet away and significantly altering its appearance. In that year, a visitor named David Kirwan died after attempting to rescue his friend's dog from the hot spring.
Vivid colors of the Black Pool in the Yellowstone National Park, Wyoming
Shrouded in Snow Fog and Steam Witches Basin is Full of boiling caldrons, hot gushing springs, fumeroles and vents.  Backcountry skiers enjoy Witch Creek splenders while staying the night and bathing in the hot stream Early March 1986.
A beautiful view of a valley in Yellowstone at sunset, steam blowing across the landscape from volcanic pools and vents.  Three bison are barely visible in the background resting in the evening light.
Colorful Inspiration Paint Pot Geyser Basin in Yellowstone National Park with beautiful scenery. the smell, the colors, the sounds are a natural experience. USA
Bubbling pool at Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
Geothermal pool in winter Yellowstone National Park steaming
A colourful and high contrast shot of a geothermal pool in Taupo in the north island of New Zealand.
Special landscapes made with film camera in USA
Eruption on Upper Geyser Basin at Yellowstone National Park in Teton County, Wyoming
Fountain Paint Pots Shadows - August 1993.  Scanned from Kodachrome slide.
Vibrant geyser
Geyser in Yellowstone National Park
Pamukkale Traventine a cross section. Abstract.
Beautiful Sapphire Pool thermal springs against a moody sky in Yellowstone National Park, Wyoming.
Ski touring in the yellowstone backcountry winter 1986
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.
Hot springs along Warner Creek in Devil's Kitchen, Lassen Volcanic National Park, California, USA. Spring water made milky by precipitation of amorphous silica as hot spring water cools. 1982 Kodachrome scanned film.
Chinese Spring near Old Faithful geyser at dusk in Yellowstone National Park.
Thermal activity, Norris Geyser Basin area, Yellowstone National Park.
Geysers and Hot Springs at Yellowstone
Yellowstone National Park, unique landscapes, geothermal features, Old Faithful Geyser, Yellowstone Lake, Grand Canyon of the Yellowstone, hot springs, mud pots, sulfur springs, mineral deposits, wildlife, bison, elk, bear, wolf, forest, river, waterfall, volcanic activity, natural wonder
Churn Geyser is a small but vigorous geyser known for its frequent and energetic eruptions. Unlike many geysers that shoot water in tall columns, Churn Geyser's eruptions are more chaotic and resemble a bubbling cauldron, with water splashing and churning within its small pool. The eruptions, which can reach up to 10 feet, occur irregularly but often, making it an intriguing and unpredictable feature in the geothermal landscape of the Upper Geyser Basin.
Special landscapes made with film camera in USA
Vibrant geyser
Yellowstone National Park - Riverside Geyser Close-up - 1981. Scanned from Kodachrome slide.
Old Faithful geyser spouting steam in the air.\n\nTaken in Yellowstone, National Park, Wyoming USA
Free Images: "bestof:Great Hot Spring, near the Grand Geyser. Yellowstone National Park. - NARA - 517131.tif Scope and content General notes 517131 Local identifier 57-HS-531"
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