Plates Move together : CONVERGENT PLATE BOUNDARIES

Learning goals: HOW ARE THE POSITIONS OF THE CONTINENTS CHANGED OVER TIME?

• When plates collide or meet• Ocean plates that meet another ocean plate or a continental plate will be

pulled under either the other ocean plate of continental plate in a process called subduction.

• The worlds largest earthquakes happen when the subducting plate gets stuck then suddenly breaks apart.

• The most explosive and dangerous volcanoes are found near convergent subducting boundaries.

• The worlds deepest landforms, trenches are found at subducting convergent boundaries

• When two continental plates collide folding up to form mountain ranges

• Plates move together

• CONVERGENT BOUNDARY• Also called:– collision boundary, – destruction boundary,

• Plates are pushed together • Crust is usually destroyed

Main Idea Supporting details

Overriding plate

Subductingplate

• Processes that destroys crust

• SUBDUCTION occurs underwater• Plates are pushed together

Subduction occurs in the ocean– The place that subduction takes

place is often called a Subduction Zone

– Subduction destroys lithosphere

• UPLIFTING – occurs on land– When 2 continental plates meet– NO lithosphere is destroyed

Mail Idea Supporting details

• 3 types of convergent boundaries • DESTRUCTIVE BOUNDARY–

land is destroyed• ocean plate moves over

another ocean plate in a process called subduction –

• This occurs at a location called a subduction zone

Convergent boundary – 1. Ocean to Ocean

Main idea Supporting details

Subduction zone

• Landforms created at an ocean to ocean convergent boundary

• Landforms created:– Deep ocean Trenches– Volcanic Arc islands– Volcanoes

• Geologic Activity at an Ocean to Ocean convergent boundary

• Earthquakes• Volcanic eruptions

Oceanlithosphere

Oceanlithosphere

Volcanic Arc Island

Subductionzone

Draw and label this diagram in your notes

Convergent boundary–

ocean to continent

• DESTRUCTIVE BOUNDARY

• Ocean plate moves under continental plate in process called subduction

• Geologic Activity– Earthquakes– Explosive Volcanic

eruptions

main idea Supporting details

Convergent boundary–

ocean to continent• Landforms,

features and structures

• Landforms created– Deep ocean trenches

occur where plates meet

– Volcan ic mountain ranges are formed

Ocean lithosphere

Continental lithosphere

Subduction zoneDraw and label this diagram in your notes

Convergent boundaries – 3. continent to continent• NO CRUST IS DESTROYED• Plates move into each

other – process =up lifting• Landform created:– Mountain ranges– Volcanoes extremely

rare• Geologic activity:– Earthquakes

Main idea Supporting details

http://blank005.tripod.com/geology/deformation.html

Many mountain ranges have formed this way-Appalachians-Himalayans-Rocky mountains-Alps

Review: HOW ARE THE POSITIONS OF THE CONTINENTS CHANGED OVER TIME?

• When plates collide or meet• Ocean plates that meet another ocean plate or a continental plate will be

pulled under either the other ocean plate of continental plate in a process called subduction.

• The worlds largest earthquakes happen when the subducting plate gets stuck then suddenly breaks apart.

• The most explosive and dangerous volcanoes are found near convergent subducting boundaries.

• The worlds deepest landforms, trenches are found at subducting convergent boundaries

• When two continental plates collide folding up to form mountain ranges

Bubble Maps are used to describe things.

1. Create 3 bubble maps and describe the 3 types of CONVERGENT PLATE BOUNDARIES2. Copy the example that has been provided for you3. Then do one for

name of Convergent boundary

Name of force

Name of geologic landform created 1 bubble for

each landform

Name of geologic

ACTIVITY that happens 1 bubble for

each activity

Ocean to Ocean

convergence

Trenches

Volcanic Arch Islands

Volcanoes

Earthquakes

compression

Describing an ocean to ocean convergent boundary

Ocean to continent

convergence

Earthquakes

Volcanic mountain

ranges

Trenches

Compression

Explosive Volcanic

eruptions

Describing an Ocean to Continent convergence