Atlantis Online
March 29, 2024, 09:41:40 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Site provides evidence for ancient comet explosion
http://www.thenewstribune.com/news/nationworld/story/173177.html
 
  Home Help Arcade Gallery Links Staff List Calendar Login Register  

Plate tectonics

Pages: [1]   Go Down
  Print  
Author Topic: Plate tectonics  (Read 2320 times)
0 Members and 84 Guests are viewing this topic.
Rebecca
Superhero Member
******
Posts: 5201



« on: May 16, 2007, 07:01:31 am »



Three types of plate boundary.

Types of plate boundaries
 
 
Three types of plate boundary.

Three types of plate boundaries exist, characterized by the way the plates move relative to each other. They are associated with different types of surface phenomena. The different types of plate boundaries are:
1.   Transform boundaries occur where plates slide or, perhaps more accurately, grind past each other along transform faults. The relative motion of the two plates is either sinistral (left side toward the observer) or dextral (right side toward the observer).
2.   Divergent boundaries occur where two plates slide apart from each other (examples of which can be seen at mid-ocean ridges and active zones of rifting (such as with the East Africa rift)).
3.   Convergent boundaries (or active margins) occur where two plates slide towards each other commonly forming either a subduction zone (if one plate moves underneath the other) or a continental collision (if the two plates contain continental crust). Deep marine trenches are typically associated with subduction zones. Because of friction and heating of the subducting slab, volcanism is almost always closely linked. Examples of this are the Andes mountain range in South America and the Japanese island arc.
Report Spam   Logged


Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum
Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy