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Convergent Boundaries—Oceanic Continental PowerPoint PPT Presentation


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Tuesday 5/31/11. Convergent Boundaries—Oceanic Continental. What we will do…. Learn that convergent plate boundaries are where two plates are coming together. Learn that subduction is when one plate goes under another plate.

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Convergent Boundaries—Oceanic Continental

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Convergent boundaries oceanic continental

Tuesday 5/31/11

  • Convergent Boundaries—Oceanic Continental


What we will do

What we will do…

  • Learn that convergent plate boundaries are where two plates are coming together.

  • Learn that subduction is when one plate goes under another plate.

  • Learn that earthquake, volcanoes and ocean trenches occur in a subduction zone.


Language objectives

Language Objectives

You will either be

  • Reading the textbook and making notes or

  • Listening the presentation and making notes.


Convergent boundaries oceanic continental

Notes: Convergent Oceanic-Continental Boundaries

Thinner and denser oceanic plate is forced under thicker and lighter continental crust—This is subduction

Oceanic plate begins to melt at about 100 miles into mantle

Melted plate is less dense so it expands towards the surface creating volcanoes


Notes geologic features

Notes: Geologic Features

Earthquakes

Volcanoes

Mountains

Deep Ocean Trenches


Convergent boundaries oceanic continental

Convergent Oceanic-Continental


Convergent oceanic continental

Convergent: Oceanic Continental


Convergent boundaries oceanic continental

Convergent Oceanic-Continental


Convergent boundaries oceanic continental

  • http://www.iris.edu/hq/files/programs/education_and_outreach/retm/tm_110311_japan/Subduction_ElasticRebound_Tsunami_480.mov


Convergent boundaries oceanic continental

Magnitude 9.0 NEAR THE EAST COAST OF HONSHU, JAPANFriday, March 11, 2011 at 05:46:23 UTC

This earthquake was the result of thrust faulting along or near the convergent plate boundary where the Pacific Plate subducts beneath Japan.

This map also shows the rate and direction of motion of the Pacific Plate with respect to the Eurasian Plate near the Japan Trench. The rate of convergence at this plate boundary is about 83 mm/yr (8 cm/year). This is a fairly high convergence rate and this subduction zone is very seismically active.

Japan Trench


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