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- Geyser (14881 bytes)
4: ...tivity may change or cease due to ongoing mineral deposition within the geyser plumbing, exchange of f...
9: ...nected to one or more narrow tubes that lead to underground reservoirs of water.
14: ...f the column and thus the pressure on the water underneath. With this release of pressure, the superh...
22: ...and eruptions will erode the channels and rapidly destroy any nascent geysers.
24: ...e inside of the plumbing systems. Over time these deposits cement the rock together tightly, strengthe... - Rift (geology) (1656 bytes)
1: ...thumb|300px|Rift Valley, Kenya Africa. Image provided by [http://classroomclipart.com Classroom Clip A...
3: ...ypically the transition from rifting to spreading develops as three converging rifts over a [[hotspot]...
5: Examples of rifts include:
9: * the [[Rio Grande Rift]] in the southwestern US
11: ...[Reelfoot Rift]], an ancient buried failed rift underlying the [[New Madrid Seismic Zone]] in the [[Mi... - Caldera (4953 bytes)
2: ... with water, creating crater lakes. The word 'caldera' comes from a [[Spanish language|Spanish]] word...
4: ==Caldera formation==
5: A caldera collapse is usually triggered by the emptying o...
7: ===Explosive calderas===
8: ...e drop in temperature around the world. Large calderas may have even greater effects.
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