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.
|South Entrance going north on US-191
|Scenery is great, ranging from mountains, canyons and open land.
|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.
|The red stains are from algae that lives in the hot water.
|Calcium carbonate covers the ground around the vents.
|A lot of calcium carbonate. We just missed the eruption here.
|More boiling water.
|There are several water falls in Yellowstone.