Grand Prismatic Spring
Wyoming
The Grand Prismatic Spring, located in Yellowstone National Park's Midway Geyser Basin, is the largest hot spring in the United States and the third largest worldwide. Measuring about 370 feet in diameter and 160 feet deep, it discharges approximately 560 gallons of hot water per minute at around 160°F. Its striking colors resemble a rainbow, created by thermophilic microbial mats that vary in hue depending on temperature and season, ranging from reds and oranges in summer to dark greens in winter. The deep blue center is due to the intrinsic color of water enhanced by the spring's depth and sterility. Noted by geologists during the Hayden Geological Survey of 1871 and earlier by trappers in 1839, the spring remains a natural marvel illustrating geothermal activity and microbial life. Its vivid coloration and immense size make it a unique and captivating natural feature, attracting visitors worldwide.
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Tipp: Visit during late spring to early fall to see the most vibrant colors, as microbial mats display bright reds and oranges in warmer months. Use designated boardwalks for safety and preservation. Consider purchasing park entrance passes in advance to avoid lines and check weather conditions before visiting.
Interessante Fakten
- •It is the largest hot spring in the United States and third largest globally.
- •The vivid colors are caused by thermophilic bacteria in microbial mats varying with temperature and season.
- •The spring discharges about 560 gallons of hot water per minute at 160°F.
- •Its colors correspond to the spectrum seen in a prism: red, orange, yellow, green, and blue.
Geschichte
The Grand Prismatic Spring was first documented by European explorers in 1839 when trappers noted a "boiling lake" likely referring to it.
The Washburn–Langford–Doane Expedition in 1870 further recorded the area, noting a nearby geyser later named Excelsior.
It was officially named for its striking coloration during the Hayden Geological Survey of 1871.
Over time, it has been studied for its geothermal and microbiological significance, remaining a key feature of Yellowstone's geothermal landscape.
Ortsführer
Grand Prismatic Spring Pool
The main hot spring pool is notable for its immense size and vibrant rainbow colors created by mineral-rich water and microbial mats.
Microbial Mats
These mats of thermophilic bacteria around the spring's edges produce the vivid reds, oranges, yellows, and greens depending on temperature and season.
