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 Lava
Most 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 te...
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
Lava flow lecture
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Lava flow lecture

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Lava flow lecture

  1. 1. What is Lava? Molten rock erupted to the Earth’s (or other planet’s) surface.
  2. 2. BASALTIC LAVA FLOWS Why should I care?
  3. 3. Craters of the Moon Lava Flows Are Mostly Considered An Oddity
  4. 4. 75% of Earth’s Crust is Lava Most of it is beneath the oceans
  5. 5. Pāhoehoe and ‘A‘ā
  6. 6. ‘A‘ā Lava Flows
  7. 7. Pāhoehoe Flows
  8. 8. Pāhoehoe Sheet Flows
  9. 9. May 1990
  10. 10. Shelly Pahoehoe
  11. 11. Pāhoehoe to ‘A‘ā Transition
  12. 12. 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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