Vi kom in i Yellowstone, Wyoming, västerifrån, från Rexburg i Idaho via Island Park och den lilla staden West Yellowstone i Montana. Vi tog in på Old Faithful Inn, alldelels vid geysern med samma namn. Den har fått sitt namn eftersom den får utbrott tämligen regelbundet, med mellan en och en halv timme och två timmars mellanrum.
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| Lewis' Falls, Yellowstone |
"Yellowstone Lake is one of the largest high-elevation lakes in North America and is centered over the Yellowstone Caldera, the largest supervolcano on the continent. The caldera is considered an active volcano. It has erupted with tremendous force several times in the last two million years. Half of the world's geysers and hydrothermal features are in Yellowstone, fueled by this ongoing volcanism"
Yellowstone: 8 983 km2
Södermanland: 8 388 km2
"The Yellowstone Caldera is the largest volcanic system in North America. It has been termed a "supervolcano" because the caldera was formed by exceptionally large explosive eruptions. The magma chamber that lies under Yellowstone is estimated to be a single connected chamber, about 60 km long, 29 km wide, and 5 to 12 km deep. The current caldera was created by a cataclysmic eruption that occurred 640,000 years ago, which released more than 1,000 km³ of ash, rock and pyroclastic materials. This eruption was more than 1,000 times larger than the 1980 eruption of Mount St. Helens. It produced a caldera nearly 1 km deep and 72 by 45 km in area and deposited the Lava Creek Tuff, a welded tuff geologic formation. The most violent known eruption, which occurred 2.1 million years ago, ejected 2,450 km³ of volcanic material. A smaller eruption ejected 280 km³ of material 1.3 million years ago.
Each of the three climactic eruptions released vast amounts of ash that blanketed much of central North America, falling many hundreds of miles away. The amount of ash and gases released into the atmosphere probably caused significant impacts to world weather patterns and led to the extinction of some species, primarily in North America."
Länk:
https://en.wikipedia.org/wiki/Yellowstone_National_Park
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| Old Faithful Inn |
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| Old Faithful Inn |
Grand Prismatic och Excelsior hot springs:
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Norris Geyser:
Mammoth Hot Springs, Yellowstone:
Jackson Lake i Grand Teton National Park:
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| Björn. |
Jackson:
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| Frukost i trädgården, Jackson, WY. |
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