Unformatted text preview: steam. It is this accumulation of steam deep in the tube that eventually causes an upward surge that sends hot water and steam gushing out of the geyser. The eruption releases pressure, and when the eruption subsides, underground water again begins to collect in the shafts which starts the cycle all over again. Geysers are usually associated with hotspots, or active volcanic areas. The Yellowstone Caldera is one such hotspot. It is the largest super volcano on the continent. The Old Faithful Geyser calls the Yellowstone National Park its home. The Old Faithful geyser is known for its predictable timing between eruptions. In 1939 the average time between eruptions was 65 minutes but today, it is around 91 minutes. This difference of time between eruptions is a sign that the Yellowstone Caldera grows more unstable....
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- Fall '11
- Yellowstone National Park, Volcano, Geyser, Yellowstone Caldera, underground water