1 / 31

Boundaries Review

Boundaries Review. By: Allison LaBuda. What is a convergent boundary?. When two or more tectonic plates or fragments of the lithosphere more toward each other and collide. Continental vs. Continental.

june
Download Presentation

Boundaries Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Boundaries Review By: Allison LaBuda

  2. What is a convergent boundary?

  3. When two or more tectonic plates or fragments of the lithosphere more toward each other and collide.

  4. Continental vs. Continental

  5. Where two continental plates collide the plates either buckle and compress or (in some cases) one plate delves called subduction, under the other.

  6. Continental vs. Ocean

  7. continental crustal material is transferred to oceanic crust by sedimentation. New material can be added to the continents by the partial melting of oceanic crust at subduction zones, causing the lighter material to rise as magma, forming volcanoes. Also, material can be accreted "horizontally" when volcanic island arcs, seamounts or similar structures collide with the side of the continent as a result of plate tectonic movements.

  8. Ocean vs. Ocean

  9. When two plates with oceanic crust converge, they typically create an island arc as one plate is subducted below the other. The arc is formed from volcanoes which erupt through the overriding plate as the descending plate melts below it. The arc shape occurs because of the spherical surface of the earth

  10. Divergent Boundaries

  11. A linear feature that exists between two tectonic plates that are moving away from each other.

  12. Ocean vs. OceanDivergent

  13. occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.

  14. Mid-ocean Ridge

  15. Occurs at an ocean vs. ocean(divergent )

  16. Transform boundary

  17. faults neither create nor destroy lithosphere, is a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral direction. Furthermore, transform faults end abruptly and are connected on both ends to other faults, ridges, or subduction zones.

  18. Subduction

  19. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.

  20. Sea-floor Spreading

  21. occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away

  22. Trench

  23. A long narrow ditchCaused by a Divergent boundary

  24. Island Arc

  25. a chain of volcanoes parallel to a mountain belt positioned in an arc shape.Caused by a Convergent Boundary Example: The Ryukyu Islands arc

  26. Ring of Fire

  27. The zone of volcanic activity surrounding the Pacific Ocean.

  28. Volcano

  29. An opening in the earth's crust through which molten lava, ash, and gases are ejected.Caused by Convergent BoundaryExample: Krakatoa Volcano

  30. Mountains

  31. A large natural elevation of the earth's surface rising abruptly from the surrounding level.Caused by a Convergent BoundaryExample: Andes Mountain Range

More Related