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The magma chamber that lies under Yellowstone is estimated to be a single connected chamber, about 37 miles (60 km) long, 18 miles (29 km) wide, and 3 to 7 miles (4.8 to 11.3 km) deep. [85] The current caldera was created by a cataclysmic eruption that occurred 640,000 years ago, which released more than 240 cu mi (1,000 km 3 ) of ash, rock and ...
The “first national park” was born 151 years ago, on March 1, 1872, when President Ulysses S. Grant signed into law the Yellowstone National Park Protection Act.. Yellowstone National Park is ...
The 29-day tour of the park on snowshoes covered nearly 200 miles, with temperatures varying −10 °F (−23 °C) to −52 °F (−47 °C) below zero. [16] Despite the problems on Mount Washburn, Haynes returned with 42 photographs of Yellowstone in the middle of winter, the first ever taken during that time of year. [17]
Yellowstone and the Great West-Journals, Letters and Images from the 1871 Hayden Expedition. Lincoln, NE: University of Nebraska Press. ISBN 0-8032-3148-2. Schullery, Paul; Whittlesey, Lee H. (2003). Myths and History in the Creation of Yellowstone National Park. Yellowstone National Park: The Yellowstone Association. ISBN 0-8032-4305-7.
While this pattern of behavior is observed most of the time, there are occasional episodes of so-called "wild-phase" activity during which the eruptions are of greatly extended duration and intervals between eruptions may be as long as three days. [4] The geyser is then unpredictable until wild-phase activity ceases and more normal eruptions ...
The Valley of the Upper Yellowstone-An Exploration of the Headwaters of the Yellowstone River in the Year 1869. Norman, OK: University of Oklahoma Press. Cook, Charles W. (July 1870). "The Valley of the Upper Yellowstone". Western Monthly Magazine. IV: 60–67. Haines, Aubrey L. (1974). Yellowstone National Park: Its Exploration and Establishment.
Mammoth Hot Springs is a large complex of hot springs on a hill of travertine in Yellowstone National Park adjacent to Fort Yellowstone and the Mammoth Hot Springs Historic District. [3] It was created over thousands of years as hot water from the spring cooled and deposited calcium carbonate (over two tons flow into Mammoth each day in a ...
Old Faithful is a cone geyser in Yellowstone National Park in Wyoming, United States. It was named in 1870 during the Washburn–Langford–Doane Expedition and was the first geyser in the park to be named. [3] [4] It is a highly predictable geothermal feature and has erupted every 44 minutes to two hours since 2000. [5]