Plate tectonics review
Upcoming SlideShare
Loading in...5
×
 

Plate tectonics review

on

  • 1,589 views

 

Statistics

Views

Total Views
1,589
Views on SlideShare
794
Embed Views
795

Actions

Likes
1
Downloads
4
Comments
0

1 Embed 795

http://mrshollandsocialstudies.wordpress.com 795

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Plate tectonics review Plate tectonics review Presentation Transcript

  • The plates are moving at a very slow rate of about one to ten centimeters per year. In areas plates are moving together and others are moving apart.
  • http://www.youtube.com/watch?v=0mW Qs1_L3fA
  • Click here for a hyperlink to an animation of convection
  • A convergent boundary is where two plates come together, or converge. The result of the plates hitting together is called a collision.
  • a. Continental crust to continental b. Continental crust to oceanic c. Oceanic crust to oceanic
  • a. Continental crust to continental crust Before collision Example: India-Asia (Himalayas) After collision from: http://www.geo.lsa.umich.edu/~crlb/COURSES/2
  • Eurasian plate Indian plate Indian plate (continental crust) running into Eurasian plate (continental crust)
  • Folded mountains – notice the rock layers
  • SUBDUCTION
  • The process by which the ocean floor sinks beneath a deepocean trench and back into the mantle is called
  • Oceanic crust is MORE DENSE than Continental!
  • • Because one plate gets pushed under another, it is called subduction. • This is where volcanoes and trenches form! all from: http://www.geo.lsa.umich.edu/~crlb/COURSES/270
  • Volcanoes form where a convergent boundary occurs between oceanic crust and continental crust.
  • South American plate (continental crust) running into Nazca plate (oceanic crust)
  • SUBDUCTION
  • Volcanoes also form where a convergent boundary occurs between oceanic crust and oceanic crust.
  • Aleutian islands of Alaska are volcanoes formed by oceanic crust converging with oceanic crust
  • Following volcanic islands in the Pacific Ocean can show us where oceanic crust is being subducted by oceanic crust.
  • Here is an great link for seeing where each type of boundary is located.