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Lava Tubes

Lava Tubes. Kacey McCallister. Purpose. To Examine and understand: Formation of lava tubes Where Oregon Lava tubes came from F eatures located in O regon lava tubes. Area Map. Lava tubes mostly south of bend but within the: Newberry Volcanic .

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Lava Tubes

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  1. Lava Tubes • KaceyMcCallister

  2. Purpose To Examine and understand: • Formation of lava tubes • Where Oregon Lava tubes came from • Features located in Oregon lava tubes

  3. Area Map • Lava tubes mostly south of bend but within the: • Newberry Volcanic

  4. Newberry volcanoErupting near bend 80,000 years ago

  5. Horse Lava Tube System

  6. Formation of the lava tubes

  7. Arnold Lava tube system

  8. Classic lava cave shape

  9. Cutbacks/Keyhole • A classic keyhole shape with different levels, caused by: • Melting • Mechanical weathering

  10. Arnold ice cave

  11. -Due to the ability of lava tubes to be a great insulator once water percolates into the lava tubes and freezes. -Sometimes it completely fills the cave. -Used for it’s ice.

  12. Breakdown • Breakdown is one of the best ways to discover a lava tube. • Area of lava tube ceiling that has collapsed • Pre cooling • Ice destruction • Water erosion

  13. Lava bombs • Rolled on the top of the lava tube flow • Sometime they will exit through a window leaving these bomb like structures

  14. Wind cave

  15. Review

  16. Lavacicle • Super heated gas on top of the Lava flow • Melts the ceiling of the lava tube • Shark tooth • Layers of lava over time • Splash • Tubular • Gas escapes through the middle of tube

  17. Sand castles

  18. Ash from Mount. Mazama percolates into lava caves. • Waters drips down forming these peaks and vallys

  19. Thousands of years to create

  20. And now……………………………. • Drum roll please………

  21. Bat cave

  22. Braided flows • Most lava flows intertwine like braided streams • They also interact with older flows to form layers. • Bat cave shows two layers

  23. Conclusion • Lava tubes need a very basaltic flow to form • Classic flows include • Smooth even sides • Occasional breakdowns • Braided flows • Special flows contain • Lavacilcles • Lava bombs • Sand castles

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