Lava flow lecture long
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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 long
What is Lava?
Molten rock erupted to the Earth’s (or other planet’s) surface.
BASALTIC LAVA FLOWS
Why should I care?
Craters of the Moon
Lava Flows Are Mostly Considered An Oddity
75% of Earth’s Crust is LavaMost of it is beneath the oceans
Pāhoehoe and ‘A‘ā
‘A‘ā Lava Flows
Pāhoehoe Flows
Pāhoehoe Sheet Flows
May 1990
Shelly Pahoehoe
Pāhoehoe to ‘A‘ā Transition
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
‘A‘ā Flow Front
Pāhoehoe Flows
Kapoho 1960
August 1990
December 1990
1984 Eruption
April 1990
June 1990
Pu‘u ‘Ō‘ō Flow Field
