EART 3 Geology of National Parks 20904

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EART 3- Geology of National Parks 2/09/04

• OUTLINE
• Tectonic Setting of Yellowstone National Park
• Hydrothermal Features of Yellowstone
• Virtual Tour of Yellowstone
• CONCEPTS
• Relative size of volcanic explosions
• Interaction of hot rock and water

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Grand Canyon of Yellowstone
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Old Faithful Geyser
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Steamboat Geyser
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3 Caldera Forming Explosions

• Huckleberry Ridge Tuff- 2 Mya 2,500 km3
• Mesa Falls Tuff- 1.2 Mya 280 km3
• Lava Creek Tuff- 0.6 Mya 1000 km3

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Huckleberry Ridge
Lava Creek
Mesa Falls
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What kind of magma is erupted at Yellowstone?
RHYOLITE!!!!
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Hydrothermal Activity

• Hot Springs- spring with temperature above body
  temperature (98.6 F)
• Mud Pot- hot spring with little water and a lot
  of altered rock (sediment clogged hot spring)
• Geyser- intermittent hot spring that erupts jets
  of hot water and steam
• Fumaroles- vent emitting gas

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Castle Geyser
Why so many geysers in Yellowstone?
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Repricipitated silica (quartz) clogs conduits
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7-10
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