plates on the move guide to plate movement s.htm

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Plates on the Move Guide to plate movement http://www.thesciencequeen.ne t/7Units.htm

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1. Divergent Also known as seafloor spreading Plates are separating from each other as a new land mass forms This is seen at mid-ocean ridges and rifts Plate separation is a slow process. For example, divergence along the Mid Atlantic ridge causes the Atlantic Ocean to widen at only about 2 centimeters per year. Picture from Author Hobart M. King

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Page 1: Plates on the Move Guide to plate movement s.htm

Plates on the Move

Guide to plate movementhttp://www.thesciencequeen.net/7Units.htm

http://www.thesciencequeen.net/7Units.htm

http://www.thesciencequeen.net/7Units.htm

Page 2: Plates on the Move Guide to plate movement s.htm

There are three types of plate movement

Page 3: Plates on the Move Guide to plate movement s.htm

1. Divergent

• Also known as seafloor spreading

• Plates are separating from each other as a new land mass forms

• This is seen at mid-ocean ridges and rifts

• Plate separation is a slow process. For example, divergence along the Mid Atlantic ridge causes the Atlantic Ocean to widen at only about 2 centimeters per year.

Picture from www.geology.com

Author Hobart M. King

http://www.geology.com/

Page 4: Plates on the Move Guide to plate movement s.htm

2. Convergent • Two continental

plates collide. & crumple the edges of the plates & form mountains.

• We can see the end result of the collision between the Indian & Eurasian plates which are the Himalayan Mountains.

Picture from www.geology.com Author Hobart M. King

Picture from USGS

Page 5: Plates on the Move Guide to plate movement s.htm

Subduction• When an oceanic plate goes

underneath or is subducted under a continental plate it is called subduction.

• This forms a trench, or deep valley, where the plates meet.

• An example of a subduction zone is the Marianas Trench where the Pacific Plate is subducting under the Eurasian Plate.

• Subduction is another type of a convergent plate movement.

Picture from www.geology.com Author Hobart M. King

Page 6: Plates on the Move Guide to plate movement s.htm

3. Transform• Two plates slide past

each other– Example: San Andreas

Fault in California

Picture from www.geology.com

Author Hobart M. King

Page 7: Plates on the Move Guide to plate movement s.htm

Page 8: Plates on the Move Guide to plate movement s.htm

DivergentDivergent ConvergenConvergentt

TransformTransform

Page 9: Plates on the Move Guide to plate movement s.htm

http://www.worldatlas.com/aatlas/infopage/ringfire.gif

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