description Monument Geyser Overview
Monument Geyser is a hydrothermal feature in the Gibbon Geyser Basin of Yellowstone National Park. It is distinguished by siliceous sinter, a mineral deposit formed when hot spring water leaves dissolved silica behind, creating monument-like structures around the feature. Despite its name, the basin has no active geysers, so Monument Geyser is chiefly of geological and historical interest rather than a regularly erupting attraction.
help Monument Geyser FAQ
Where is Monument Geyser located?
Monument Geyser is in the Gibbon Geyser Basin of Yellowstone National Park. The basin contains geysers and hot springs shaped by Yellowstone's active hydrothermal system.
Why is Monument Geyser called Monument Geyser?
The feature is distinguished by siliceous sinter deposits that form monument-like structures around it. Silica is left behind when hot spring water carrying dissolved minerals cools.
What is siliceous sinter at Monument Geyser?
Siliceous sinter is a mineral deposit made mainly from silica carried in hot water. As the water loses heat, the dissolved silica can build pale, hard structures around the hydrothermal feature.
Is Monument Geyser safe to touch or approach?
Yellowstone hydrothermal ground can be thin, unstable, and dangerously hot even when a feature appears quiet. Visitors should remain on designated routes and follow Yellowstone National Park warnings.
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