Types of Plate Boundaries When 2 plates meet

Types of Plate Boundaries

When 2 plates meet…. . • 1 - They can crash together = • Convergent Boundary OR • 2 - They can move away from each other = Divergent Boundary OR • 3 - They can slide past each other = Sliding/Transform Boundary

Convergent Boundaries • There are two types of Convergent Boundaries: – A. Subduction: Subduction when one plate is more dense than another, the more dense plate goes underneath the less dense plate. Subduction The 2 nd type is collision

Convergent Boundaries: Subduction • One plate goes under the other • Features that occur: Earthquakes, Volcanoes, Ocean Trench Remember: “The Ocean floor is going DOWN!!!!”

Example • Mt. St. Helens- Juan de Fuca plate goes under the North American Plate. What are some indicators that a volcano might erupt soon?

Convergent Boundaries, Collision – B. Collision: Collision when the 2 plates are the same material. When they hit, they both buckle up – (this makes mountains) • The two plates have the same density, they buckle up and move to a higher elevation • Features: Earthquakes, Folded Mountains

Example • Mt. Everest, Himalayas • The plates are still colliding and gaining Elevation • https: //www. yo utube. com/wat ch? v=Hu. SHO Q 6 gv 5 Y What are some forces of nature that keep Everest from getting much higher?

Divergent Boundaries • When two plates move apart. • Features: – In continents: – Rift Valley, Volcanoes, Earthquakes – In oceans: – Mid-Ocean Ridge, Volcanoes, Earthquakes

Examples: • Great Rift Valley, Africa • Mid-Atlantic Ridge, Atlantic Ocean • https: //www. youtube. com/watch? v=sg. DM 6 m 0 l. UGY

Example: Great Rift Valley, Africa

Sliding/Transform Boundary • When two plates slide past each other. • Features: Earthquakes

Example: California- Pacific Plate slides past the North American Plate at the San Andreas Fault.

Example: San Andreas Fault Where is it? https: //www. youtube. com/watch? v=yft. Hos. O 0 e. Uo

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