Lava flow lecture
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What is Lava? Molten rock erupted to the Earth’s (or other planet’s) surface.
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Transcript of Lava flow lecture
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What is Lava?
Molten rock erupted to the Earth’s (or other planet’s) surface.
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BASALTIC LAVA FLOWS
Why should I care?
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Craters of the Moon
Lava Flows Are Mostly Considered An Oddity
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75% of Earth’s Crust is LavaMost of it is beneath the oceans
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Pāhoehoe and ‘A‘ā
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‘A‘ā Lava Flows
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Pāhoehoe Flows
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Pāhoehoe Sheet Flows
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May 1990
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Shelly Pahoehoe
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Pāhoehoe to ‘A‘ā Transition
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WHY THE DIFFERENCE?
Lava Flows consist of a Fluid and Crust
• FLUID ––Viscosity or Stickiness of the Lava– Affected by temperature, water, composition
• CRUST––Shear Strain Rate or Tearing Force– Affected by ground slope and amount of lava
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