West Thumb Geyser Basin in Yellowstone National Park

One of the smallest and quietest basins, mostly hot springs and pools. There is a walkway throughout the area so it is a good place to see these features close up.


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Mud pot
This one is right at the entrance to the parking lot
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Surging Spring
At the high point of the cycle, the water is overflowing a little. You can see a little boiling in the water.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Collapsing Pool (edge)
The ledge of rock on the side of this pool has partialy collapsed, giving it its name.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Ephedra Spring
Greenish-yellow on the edge and greenish-blue in the center. This is a small pool that isn't overflowing.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Blue Funnel Spring
A quiet blue pool in the middle of the basin.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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West Thumb Geyser Basin walkway

Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Black Pool
Named black pool, but it is blue and giving off a good amount of steam. People look at it from the boardwalk on the left.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Outflow from Black Pool
Where is the flow is the strongest and hottest it is bright orange. It goes into Lake Yellowstone.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Seismograph Pool

Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

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Seismograph Pool
It quickly gets very deep.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY