We took sometime to see more of the caldera area at Yellowstone, along US-191. Old Faithful is only one of many geysers, mud pots and steam vents. The Yellowstone supervolcano last erupted about 640,000 years ago. When it did, it left behind a caldera, a landform created by the inward collapse of a volcano's peak. These links will explain it. Our next stop will be Salt Lake City, Utah.
https://www.nps.gov/yell/learn/nature/volcano.htm
https://en.wikipedia.org/wiki/Yellowstone_Caldera
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| South Entrance going north on US-191 |
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| Scenery is great, ranging from mountains, canyons and open land. |
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The next photos are from the Firehole Lake area, a short drive east of US-191.
The Firehole River follows US-191 on the west side of the highway. |
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| The red stains are from algae that lives in the hot water. |
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| Boiling water. |
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| Calcium carbonate covers the ground around the vents. |
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| A lot of calcium carbonate. We just missed the eruption here. |
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| More boiling water. |
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There are several water falls in Yellowstone.
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